PROVIDE THE SOURCE CODE FOR LINUX C WITH OUTPUT  Write a program to implement page replacement technique. Consider a reference string: 4, 7, 6, 1, 7, 6, 1, 2, 7, 2. the number of frames in the memory is 3. Find out the number of page faults respective to: a. Optimal Page Replacement Algorithm b. FIFO Page Replacement Algorithm c. LRU Page Replacement Algo

Consider the following piece of pseudocode: new Vector w(4) w[1] 2 for 1

Draw the function ? = 1⁄(1 + ?2) on 2 dimensions X and Z by dividing the -2π to 2π range of x from steps of 0.1 with color blue and dash-dotted line. Imagine that the drawn line of z is a ‘thread’ which if we can copy it multiple times and those copies are kept in parallel to the first one over the direction of a 3rd axis we will generate a surface representing the same curve. a. Use meshgrid function on the x vector and save the result on xx. b. Using size function find the size of xx. c. How does dimensions of xx relate to dimensions of x? d. Using the knowledge of vector multiplication in Octave and using in-built generating functions and size functions, for a given vector v write a single argument function to generate its ‘meshgrid version’ and return it in the variable rep. Avoid using loops! Name your function replicate. (Note: Check if the result is identical to the meshgrid function’s output. Cross check with a small vector) ChatGPT

In c++ please Example of Output: Input a string: ........ letters r b с f 2. Demonstrate by writing a program to calculate the frequency of every letter in an input string s. S e a. Your program should be able to input a string. b. Your message should be constructed from at least 50 letters. c. Calculate the frequency of each element in the string and store the results into a linked list. d. Your program should be able to print each letter and its respective frequency. e. Identify the letter with the highest frequency in your message. f. Sort the linked list in ascending order using an algorithm of your choice. Write a short justification of your choice. frequency 1 4 6 12 20 24 30