Given point P(r = 0.8, = 30, = 45) and E = 1/r 2 [cos

Given point P(r = 0.8, θ = 30°, ϕ = 45°) and E = 1/r² [cos ϕ a_r + (sin ϕ/ sin θ) a_ϕ], find

(a) E at P;

(b) |E| at P;

(c) A unit vector in the direction of E at P.