Required information $-$ please answer w work for understanding! thank you

A load $P$ is supported as shown by a steel pin that has been inserted in a short wooden member hanging from the ceiling.

The ultimate strength of the wood used is $60$ MPa in tension and $7\mathrm{.}5$ MPa in shear, while the ultimate strength of the steel

is $145$ MPa in shear. The diameter of the pin is $d=17mm$ and the magnitude of the load is $P=20kN.$

NOTE: This is a multi$-$part question. Once an answer is submitted, you will be unable to return to this part.

Determine the required values of $b$ and $c$ if the factor of safety for the wooden members is $3\mathrm{.}2912.$

The required value of $b$ is

mm $.$

The required value of $c$ is

mm $.$