W a] Find a vector. tilt of magnitude 3 that is in the opposite direction to the vector . u={2. 1. 4). to) Let u=(4. 3, D) and v=(2. .1 ~2) be veetdrs. Find the angle between u and v. Give the answer in two {2} decimal places. c} Find the area of the parallelogram with vertex at the origin where the vectors a=21j+k and b=i+31tt aeedges