CIVIL ENGINEERING HELP: Solving a truss by method of sections?

For the truss shown below, calculate the reaction forces at A and B, then use the method of sections to calculate the internal forces of the members cut by the dashed line. a = 3.0 m and b = 3.5 m. P1 = 14 kN, P2 = 13 kN and P3 = 7 kN. Reaction force at A in y direction (kN, positive up) = ? Reaction force at B in... show more For the truss shown below, calculate the reaction forces at A and B, then use the method of sections to calculate the internal forces of the members cut by the dashed line. a = 3.0 m and b = 3.5 m. P1 = 14 kN, P2 = 13 kN and P3 = 7 kN.

Reaction force at A in y direction (kN, positive up) = ?
Reaction force at B in y direction (kN, positive up) = ?
Reaction force at B in x direction (kN, positive right) = ?
Forces in members (kN, tension positive) = ?
1 = ?
2 = ?
3 = ?
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