1. Given a vector A = (-3, sqrt {3}), find the magnitude and direction of vector A. 2. Vector A has a magnitude of 4 and a direction of 60 and vector B has a magnitude of 8 and a direction of 300. Find the magnitude and direction of vector R, where R = A+B. 3. Given vector A=5i+3j+k and B=3i-4j+8k, find 3A-2B. 4. Find the magnitude of vector A-3i-12j+4k. Also find a unit vector parallel to vector A.