xP$4$ For the truss shown with $=60,($a$)$ determine the reactions at supports A and $D.($b$)$ Use the method of joints to calculate the force in members $AG,AB.($c$)$ Use the method of sections to calculate the force in members $EF,CF,$ and $BC.$ State if the respective members are in tension or compression.

$R_A=$

$R_D=$

$F_{AG}=$

$F_{AB}=$

$F_{EF}=$

$F_{CF}=$

$F_{BC}=$