Three vectors are shown at right. A. Graphically find A + B + C (you should not compute A (60 N) any numbers in this part, just draw the three vectors and the resultant vector). B (45 N) 159- 620 (30 N) B. Graphically find A - B + C. C. Find the components of -A + B - C. D. Suppose you added a fourth vector to these three vectors so that they all added up to zero: A+ B + C+ D = 0. Find the components of D