You are expected to earn some money for the next fifteen years at that are $$2,000$ the first year, at the end of the year, and for the following years the money will increase $15\%$ annually. Now you have $$30,000$ in your account. At a return rate of $4\%,$ how much money that would be at the end of the $15$ years, and that value how much is worth it today with a discount rate of $6\%?$ Provide all possible calculations in your excel sheet, and discuss your work here.