could u please solve this question and explain how you got the solution on excel sheet

How do pure risks differ from financial risks? Why minimizing costs is equivalent to

value maximization?

$3$: Assume you plan to start a business to paint houses in a nearby neighborhood. The business needs an

initial investment of $$10,000.$ The gross return to your $$10,000$ investment will be either $$30,000($if the

economy is booming and you don't face much competition in the industry$)$ or $$5,000($if the economy

is slowing down and you face fierce competition$)$ after one year. What is the business' expected return

on assets and return on equity?

$4$: Now suppose you have $$5,000$ and need to borrow $$5000$ from the bank. The bank charges an interest

rate of $10\%$ per year. What is the business's return on equity and return on assets?