Create 5 variations of the following problem but do not show…

Creаte 5 vаriаtiоns оf the fоllowing problem but do not show the answers. At a point subjected to plane stress on the surface of a backhoe, the stresses are σx = 7 ksi, σy = –28 ksi, and τxy = 19 ksi. Determine the angle θp corresponding to the orientation of the principal planes at the point.