Answer:
The present worth of the loan is $6,250
The start of payment will after 4 years
The nominal interest rate is 6.1% compounded monthly which is equal to 6.27% effective.
The future worth (after graduation) of the loan is
F = $6,250 (1 + 0.0627)^4 = $7,971.18
The interest is
$7,971.18 - $6,250 = $1,721.18
I didn't round off when solving these so it's not the exact answer among the choices but the closest is letter B $1,722.22
Explanation: