Forces 1, 2, and 3 act on the structure shown below, at an overhead View. We wish to put the structure in equilibrium by applying a fourth force, at a point such as P. The fourth force has vector components hand v- We are given that a = 2.1 m, b = 3.9 m, c: 1.6 m, F1 2 29 N, F2 2 11 N, and F3 2 8.9 N. {a} Find Fh. {b} Find F... {c} Find 0'. 3