Assuming the following yields:

Week $1$: $3\mathrm{.}84\%$

Week $2$: $3\mathrm{.}51\%$

Week $3$: $3\mathrm{.}95\%$

Answer the below questions.

$($a$)$ Compute the absolute yield change and relative yield change from week $1$ to week $2.$

$($b$)$ Compute the absolute yield change and relative yield change from week $2$ to week $3.$