#### Answer

The monthly payments are $\$508$
The interest is $\$4555$

#### Work Step by Step

We can use this formula to calculate the payments for a loan:
$PMT = \frac{P~(\frac{r}{n})}{[1-(1+\frac{r}{n})^{-nt}~]}$
$PMT$ is the amount of the regular payment
$P$ is the amount of the loan
$r$ is the interest rate
$n$ is the number of payments per year
$t$ is the number of years
Since the down payment is $\$12,000$, the amount of the loan is $\$25,925$
$PMT = \frac{P~(\frac{r}{n})}{[1-(1+\frac{r}{n})^{-nt}~]}$
$PMT = \frac{(\$25,925)~(\frac{0.0658}{12})}{[1-(1+\frac{0.0658}{12})^{-(12)(5)}~]}$
$PMT = \$508$
The monthly payments are $\$508$
We can find the total amount paid.
$\$508 \times 60 = \$30,480$
The interest is the difference between the total amount paid and the amount of the loan.
$I = \$30,480 - \$25,925 = \$4555$
The interest is $\$4555$