part d please

Knowledge/Understanding (15 marks) 1. If u = [1,-3,-2] and v = [4,-5,3] find: a) 21 -3v [2] b ) 27 + V - 5jl c) Find Q, where P (-7,5,-1) and PQ = 21 13] d) Find wwhich is orthogonal to both u & v [3]