Answer:
8%
2%
Explanation:
Real interest rate is interest rate that has been adjusted for inflation . It is calculated as nominal interest rate - inflation rate.
Nominal interest rate is interest rate that has not been adjusted for inflation. It is calculated as real interest rate + inflation rate. The nominal interest rate is the more commonly quoted interest rate.
Nominal interest rate = 4%+4%=8%
After tax real interest rate = [nominal interest rate × ( 1 - tax rate )] - inflation rate
0.08 × (0.75) = 0.06 = 6%
6% - 4% = 2%