Given = (5,2,1) T a normal to plane E1, a point A = (1,2,3),which lies in plane E1 and a point B = (4, By, 2), which is also in plane E1. Give the plane equation of a plane E3, which is orthogonal to...

Given = (5,2,1) T a normal to plane E1, a point A = (1,2,3), which lies in plane E1 and a point B = (4, By, 2), which is also in plane E1. Give the plane equation of a plane E3, which is orthogonal to plane E1 and runs through the point P = (1, 1, 1).