Additional Problem $3(10$ points$)$:

Determine the following for the system below which consists of three steel plates that

are $3\mathrm{.}2-$inches wide by $\frac{1}{2}-$inch thick and joined together by two $\frac{3}{4}-$inch$-$diameter bolts

that pass completely through all three plates:

a$)$ Maximum average shear stress in the bolts $($assume load is split evenly between

the two bolts$).$

b$)$ Maximum average normal stress in the steel plates $($and identify whether this

value occurs in plate $A,B,$ or C $).$

c$)$ Maximum bearing stress that develops in the plates at the bolts $($and identify

whether this value occurs in plate $A,B,$ or C $.$