python programming Write an expression whose value is the concatenation of the three strigs name1, name2, and name3, separated by commas. So if name1, name2, and name3, were (respectively) "Neville", "Dean", and "Seamus", your expression's value would be "Neville, Dean, Seamus".

The local Martins awards coupons(just kidding) depending on how much a customer spends on groceries. For example, if you spend $50, you will get a coupon worth eight percent of that amount. The following table shows the percent used to calculate the coupon awarded for different amounts spent. Write a program as a C# application that calculates and prints the value of the coupon a person can receive based on groceries purchased.   Here is a sample run:   Please enter the cost of your groceries: 14 You win a discount coupon of $ 1.12. (8% of your purchase) Money Spent   Coupon Percentage   Less than $10 No coupon From $10 to $60 8% More than $60 to $150 10% More than $150 to $210 12% More than $210 14%

Python please: If the score is between 90 and 100, the grade is A, and the teacher comment is 'Exceptional work' for 100 only 'Excellent work' for anything other than 100 If the score is between 80 and 89, the grade is B, and the teacher comment is 'Very Good, can do better' If the score is between 70 and 79, the grade is C, and the teacher comment is 'Good, but need to work harder' If the score is between 60 and 69, the grade is D, and there are no teacher comments. If the score is below 60, the grade is F, and the teacher comment is 'Fail, need to appear for a retest' For example if the input (student test score) is 100 the output is The Student grade is A and the teacher comment is 'Exceptional work'

A complex number is a number in the form a+bi, where a and b are real numbers and i is √(-1)   The numbers a and b are known as the real part and imaginary part of the complex number, respectively. You can perform addition, subtraction, multiplication, and division for complex numbers using the following formulas:   a + bi   +   c + di  =  (a+c) + (b+d)i    (addition) a + bi   −  (c + di) = (a−c) + (b−d)i   (subtraction) (a + bi) * (c + di) = (ac−bd) + (bc+ad)i   (multiplication) (a + bi) / (c + di)  = (ac+bd) / (c2+d2) + (bc−ad)i / (c2+d2)   (division)   You can obtain the Absolute Value for a complex number using the following formula: |a + bi|  =  √(a2 + b2)   A Complex number can be interpreted as a point on a plane by identifying the (a,b) values as the coordinates of the point. The absolute value of the complex number corresponds to the distance of the point to the origin, as shown in the example below.   (1) Design a class named Complex for representing complex numbers Include…