An investment fund of $20,000 is made into a fund at time t = 0. The fund develops the following balances over the next 4 years: t A(t) 0 20,000 1 20,400 2 20,900 3 21,650 4 22,400 (A) Find the effective rate of discount for the first year, i.e. d4. Round your answer to 3 decimal places. d1 = % (B) Find the effective rate of discount for year 4, i.e. d4. Round your answer to 3 decimal places. d4 = %