Why does this occur?

$-$Select$-$

$-$Tielect$-$

The annilty in part $($a$)$ is compounded loss frequently, Berefore, more interest is samed on prediody expat inerme.

The annulty in part $($a$)$ is compounded more frequently; therefore, more interest is earned on prefindy samed internat

The arewity in part $($b$)$ is correounded less frequently, therefore, more interest is earned on grediedy easued intereat.

The arnuity in part $($b$)$ is compounded more frequently, therefore, more interest is earned en presouly earnet inerent incls