Suppose we invest $21664 in a fund. Three months later our balance has grown to$23804 and we deposit an additional $4000. Two months later the balance is $28616 and we withdraw $14000. Two years after the initial investment the balance of the fund is $25132

(a) Find our annual yield (you may need some kind of numerical solver, for example,Wolfram Alpha).

(b) Compute the dollar-weighted annual yield over the investment period.

(c) calculate an approximate version of the dollar-weighted yield.

no excel worksheets please I need to see the equations