Lets practice matrix operations with for loops. Create a random matrix 10*10 in size, e.g. A=rand(10); Then use two for loops (nested for loops) to survey each element in each column and row and do the following operations: (a) Add all the elements together; (5 points) (b) When the element is smaller than 0.5, set it to zeros; When the element is larger or equal to 0.5, set it to ones. (5 points)