The United World Corporation has three subsidiaries.

a$-1.$ Compute the return on sales. $($Do not round intermediate calculations. Round the final answers to $2$ decimal places.$)$

a$-2.$ Which division has the lowest return on sales?

magazines

computers

cable TV

b$-1.$ Compute the ROA. $($Round the final answers to $2$ decimal places.$)$

b$-2.$ Which division has the highest ROA?