mainly need help with part d) and e) but preferably all

Create a matrix of zeros with 4 columns and 5 rows (4 times 5) using the zero command. Create a row vector " j" from 75 through 225 with an interval of 25. Find the sum "S" of vector "j'" s elements. d) Create a column vector "k" with the same length as "j", then add them. e) Perform element-by- element multiplication and division using "k" and "j" you created