Question

A left-hand cable has a
tension T1 and makes an angle of 50◦ with
the horizontal. The right-hand cable has a
tension T3 and makes an angle of 45◦ with
the horizontal. A W1 weight is on the left
and a W2 weight is on the right. The cable
connecting the two weights has a tension 72 N
and is horizontal.
The acceleration of gravity is 9.8 m/s^2
Find the mass.
Answer in kg