Problem $1)$ For the following heam

a$)$ Calculate $I_{yz}.$

b$)$ Calculate the neutral axis rotation angle, $.$

c$)$ With $I_z=4$ in ${?}^4,I_y=111i{n}^4,M_y=0,M_z=1,000lb*in,$ locate and calculate the maximum tensile stress, ${}_x($you might

need to check multiple locations to see which has the highest tensile stress$).$