Please help solve for both problems $1$ and $2.$ Thank you

$1)$ A $30$ hp motor operating at $2500$ rpm is connected to a $4$ ft long hallow shaft. The outside diameter is $1^(\text{'}\text{'})$ and the wall thickness is $1//8^(\text{'}\text{'})$

a$)$ Determine the minimum and maximum shear stress in the shaft

b$)$ If we want a factor of safety against failure of $1\mathrm{.}5,$ how strong does the material need to be in shear?

c$)$ Determine the angle of twist in the shaft in radians, use G$=8000$ksi

$2)$ For the cross section located at pt E on the frame

a$)$ Determine the maximum normal stress on the cross section

b$)$ Determine the maximum shear stress on the cross section

c$)$ T$/$F: the answers for parts a & b happen at the same point on the cross section