-15 Which one of the following Riemann Sums approximates e" da using 4 subintervals of equal length where the representative points are chosen to be the right endpoint of each subinterval. 6+9+12+15 12 4 346+9+12 . 12 4 [ es + ed + el2 + ell ] - [ e4.5 + e7.5 + @10.5 + @13.51 14A math tee shirt business is expected to generate 41,000 dollars in revenue per year for the next 10 years. If the income is reinvested in the business at a rate of 7 percent per year compounded continuously, which expression below is the total accumulated value of this income stream at the end of 10 years? O 41, 000e0.7 O - 10 41, 000e0.7 at O 10 20.7 41, 000e-0.07t dt O - 10 41, 000e0-07t at - 10 * 41, 000 O . 10 -0.07 41, 000e-0.7t atYour math professor has decided to retire and return to his jetsetting life style. He wishes to establish a fund from which he can withdraw 3,000 dollars per month for the next 30 years. If the fund earns 8 percent per year compounded continuously, how much money does he need now to establish the fund? O 36, 000 0.08 (e2.4 + 1) 36, 000 0.08 (e2.4 - 1) O 36, 000 (1 - e-2.4) 0.08 12* 30 0.08 (1 - e 2.4) O 12+ 30 0.08 (e2.4 - 1)