1a. Use EXCEL A Car company signed a $75 million contract with ABB of Switzerland, for automated underbody assembly lines and line control systems. If ABB will be paid half of the contract amount in year 2 and the other half in year 5, what is the present worth of the contract at 18% per year interest? 1(b) Jane deposited $170,000 in her retirement portfolio NOW, she withdrew $10,000 in year 5 and invested $12.000 in year 10, AND HER portfolio increased to $815.000 over a 15 year period, what annual rate of return did she make