Let i, j and k denote the standard basis vectors of RS. Let u = -j - 2k and 3 = -3i + 3j - 2k. a) Calculate the following orthogonal projection: proj(u) = FORMATTING: Write your answer in the form Ai + Bj + Ck. eg, 3i + 2k or (2i + 3j - 5k) /4. Do not put arrows on the vectors i, j b) What is the angle (in radians) between u and ? 0 = Number rad FORMATTING: Round your answer to 2 decimal places