Q1) (Answer one only) :- (25 marks) 1. Find unit vector the perpendicular to the plane PQ X PR P(1,1,1), Q(2,1,3), R(2,2,1). 2. Find x,y and z from these equations by using Grammer Rule. x+y=1 .......... 1 y+z=1 ...... 2 x+y+z=1..........3