plz solve all parts if possible.thank you very much!

The annual force of interest, 8(), is a function of time. At any time t, measured in years, it is given by the formula below 0.04+0.02e0.010st 20 (a) Derive and simplify as far as possible expressions for the present value at time 0 of $1 due at time t. Hint: we require two different expressions, one for 0 st 20 (a) Derive and simplify as far as possible expressions for the present value at time 0 of $1 due at time t. Hint: we require two different expressions, one for 0 st