Extracted text: F1 F2 a F3 B F F4 a Determine the force in members BF, BG, and AB. Tension is positive and compression is negative. Use F1 = 6 kN, F2 = 5.5 kN, F3 = 10 kN, F4 = 11 kN, and a = 4.2 m. The force in member AB in kN (round to one decimal place): kN The force in member BG in kN (round to one decimal place): kN The force in member BF in kN (round to one decimal place): kN