a) Use a for loop to sum the elements in the following vector: x = [1, 23, 43, 72, 87, 56, 98, 33] Check your answer with the sum function. b) Repeat the (a) problem using a while loop. c) Use a for loop to create a vector of the squares of the numbers 1 through 5. d) Use a while loop to create a vector of the squares of the numbers 1 through 5.