Write a Python program that contains multiple user-defined functions which calculate storage requirements and costs. These functions will provide useful metrics in the context of data storage and backup solutions. Perform the following steps: Create a function named calculate_backup_size that takes two arguments: data_size (in gigabytes) and backup_frequency. This function should return the data_size multiplied by backup_frequency, representing the total storage needed for backups in a week. Create another function named calculate_storage_cost that takes two arguments: backup_size and cost_per_gb. This function should return the value of backup_size multiplied by cost_per_gb, representing the total cost for the backup storage. Create a third function named storage_info that takes four arguments: data_size, backup_frequency, cost_per_gb, and weeks. This function should call calculate_backup_size and calculate_storage_cost functions, taking the appropriate arguments. Then it should multiply the cost by the number of weeks. It should return a string that says "The total storage needed for backup is X GB and the total cost for Y weeks is Z dollars", replacing X, Y, and Z with the calculated values. Prompt the user to enter values for data_size, backup_frequency, cost_per_gb, and weeks. If the user does not enter a positive number, your program should catch this error and ask for the input again. Call the storage_info function with the user-provided data_size, backup_frequency, cost_per_gb, and weeks and print the returned string. Provide comments in your code to explain the logic used. Test your program with different inputs and ensure that it performs the calculations correctly.

How can I Write a Python program that can convert a Fahrenheit temperature to Celsius, or vice versa. The program should use two custom functions, f_to_c and c_to_f,  to perform the conversions. Both of these functions should be defined in a custom module named temps. Custom function c_to_f should be a void function defined to take a Celsius temperature as a parameter. It should calculate and print the equivalent Fahrenheit temperature accurate to three decimal places. Custom function f_to_c should be a value-returning function defined to take a Fahrenheit temperature as a parameter. This function should calculate the equivalent Celsius temperature and return it. In the main function, your program should: prompt the user to enter a temperature (as a float type). indicate the temperature scale of the temperature just entered. call the appropriate function from the temps module. if the Celsius temperature is being determined, it should be displayed accurate to three decimal places.

2. Create a module named grading that contains the following two functions: • calc_average() – this function should accept five (integer) test Scores as arguments and return the average of the scores. • determine_grade() – this function should accept a test score as an argument and return a letter grade (string) for the score, based on the following: A 90-100 80-89 C 70-79 60-69 F Below 60 Write a program that imports your grading module. Your program should include a main() function that asks the user to enter five test scores. The program should display a letter grade for each score and the average test score rounded to 1 decimal place.

Which of the following is true about designing and writing a function in Python? OThe name of a function should be a single word loosely associated with what the function does. OParameter variable names must be the same name as the arguement variable that will be passed to them. OWhen writing a function, the more arguments the better. OFunctions that are defined by the user and used in the source code file in which they are defined must be defined at the top of the source code file, before the first use of the function. OWhen writing a function, try to do as much as possible in a single function.