Need answers from (b) to (e) in MATLAB please, I will upvote right away

Part II 1. Please perform the following operations with the matrices below: x=[1,2,5],y=[312450],z=543378689 (b) Multiple column 2 of y by 3 and add the result to column 3 of y. Column 1 should remain unchanged. Only column 3 should change. (c) Multiply the corresponding elements of row 1 and row 3 of z, and place the result in row 2 , replacing the previous values. Row 1 and 3 should remain unchanged. Only row 2 should change. (d) Extract the diagonal of z, take its transpose, multiply its values with the corresponding elements of x, then set the diagonal of z equal to this result. Only the diagonal of z should change. The values of x should remain unchanged. (e) Create the following matrix: [xyz]