using the printnum.s under examples in canvas, create a program that will have a variable called num initialized to 3. then it will print a menu selection to either square the num or do a minus 7 to it or quit. it will print the new value on square or minus. any other command should give an error. like so with the input being: smxsq enter s for square, m for minus 7, or q for quit: s 9 enter s for square, m for minus 7, or q for quit: m 2 enter s for square, m for minus 7, or q for quit: x invalid command enter s for square, m for minus 7, or q for quit: s 4 enter s for square, m for minus 7, or q for quit: q remember to use the printnum subroutine to print the value.