A hemispherical window (or viewport) in a decompression chamber (see figure) is subjected to an internal air

Question:

A hemispherical window (or viewport) in a decompression chamber (see figure) is subjected to an internal air pressure of 80 psi. The port is attached to the wall of the chamber by 18 bolts.
Find the tensile force F in each bolt and the tensile stress ( in the viewport if the radius of the hemisphere is 7.0 in. and its thickness is 1.0 in.