1. What single deposit of size $X into a fund paying 4% compounded annually is required at t = 0 in order to make withdrawals of $810 each at t = 4,5,6, and 7 and a single withdrawal of $1020 at t = 10? $

2. Using a 4% annual compound interest rate, what investment today is needed in order to withdraw $4,000 annually

a). for 10 years? $

b). for 10 years if the first withdrawal does not occur for 3 years? $

please answer both thank you