I don't understand how to get the first or second question about while loops and nested loops in matlab. I know I need to start with a function but the rest I'm drawing a blank.

Question 1: you must use While Loop to receive credit for this question The recurrence relation R is defined as follows Rn-3 x Rn-1+4 for n > 1 R1= 0 Using a while loop, calculate the sum R1 R3RsR1, and print it. Question2: you must use Nested For Loops to receive credit for this question. Write a script to fill a 3x3 matrix where the element value is equal to the sum of its row and column number except for the diagonal elements which are zeros