Assuming the following yields:

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

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

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

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 $3.$