Determine the Force F required to hold the bar AB in a horizontal position on the smooth inclines shown in figure below. Also determine the reactions at A and B F 90 N 1.2 m 4.2 m 0.6 m A B 60 450In order to raise the lamp post from the position shown, force F is applied to the cable. If F = 890 N, determine the moment produce by F about point A. in kip.ft