If Curly would like to recelve $2,000 monthly payments at the end of each month for 15 years and would like to have $40,000 left at that point. He expects to earn 7% compounded monthly. a) How much would he need to Invest today? b) How much interest would he have earned? Partial marks will be considered, so show the values you Inputted for each varlable on your calculator, or the function that you entered In Excel. Express your final answers rounded to o decimal places