Determine the weight of the unit and the location (x, y) of its center of gravity G.

The air-conditioning unit is hoisted to the roof of a building using the three cables. If the tensions in the cables are TA, TB and TC, determine the weight of the unit and the location (x, y) of its center of gravity G.
Given:
TA = 250 lb
TB = 300 lb
TC = 200 lb
a = 5 ft
b = 4 ft
c = 3 ft
d = 7 ft
e = 6 ft