a) An account uses an annual nominal interest rate compounded monthly of i(12)=12%.$1200 is invested today. What is the value of the investment in half a year? b) What is the present value of $6000 at t=7 if i(4)=3% ? c) An account uses an annual nominal discount rate compounded semi-annually of d(2)=5%. $1200 is invested today. What is the value of the investment in 2.5 years? d) What is the present value of $6000 at t=4 if d(4)=3\%