Dan invests 5000 into a fund at time 0 and receives payments of 600 at the end of periods 1-3, and a payment of 650 at the end of period 4, a payment of 700 at the end of period 5, a payment of 750 at the end of period 6, increasing each payment's size by 50 each period, resulting in a payment od 1050 at the end of period 12.

Find the internal rate of return for this investment. Please show on BAII if possible.