Based on the following cash flows ( t=0 to t=5 ), calculate the approximate-ERR. Assume the MARR is at 10%. t=0 receipt of $20,000. t=1 disbursement of $40,000. t=2 no cash flow t=3 no cash flow t=4 receipt of $12,000. t=5 receipt of $10,000. 9.87% 5.98% 6.54% 7.39% 8.49%