Please solve these questions in details and fully explaination. Thanks so much in advance.

1. Determine a) The magnitude of the moment of force F1 about point B in N-m. b) The magnitude of the moment of force F2 about point B in N-m. C) The magnitude of the moment of force F3 about point B in N-m. d) The magnitude of the resultant moment of the three forces about point B in N-m. F2=300N 3 F3=500N 2. The pipe assembly is subjected to the force of F = 80 N. The position of C from A is defined by following values: L1 = 0.25 m, L2 = 0.3 m, and L3 = 0.25 m. If or = 40 and B = 25. Determine the i,j and k component (in N.m) of the moment of this force about point B