Answer
Part A: $I=63$
Part B: $\$3213$
Work Step by Step
Part A: $I=PRT$ (Interest Formula)
P(price)=3150, R(interest rate)=.04, T(time)=6/12
$I=3150(.04)(6/12)$
Solution. Interest is $\$63$
$I=63$
Part B: Interest is 63. Price is 3150.
$63+3150=3213$
The 63 is the interest you got in 59a and you add that to the original price in 59a which 3150.
$\$3213$
