A loan of $$9600$ is repaid by equal payments made at the end of every three months for $3$ years. If interest is $7\%$ compounded quarterly. a$)$ What is the size of the periodic payment? b$)$ What is the interest paid in the $9$th payment? $($Money up to $2$ d$.$p$.)$

$PV=$

$\frac{\text{I}}{Y}=$

$Cr$

$i=$

$n=$

PMT $=$

For interest paid in $9$th instalment, we need outstanding balance after $8$ payments:

$n=$

Outstanding Balance ag after $8$th payment $=$

Interest paid in $9$th payment$=$