In the figure below the left-hand cable has a
tension T1 and makes an angle of 55 ◦ with
the horizontal. The right-hand cable has a
tension T3 and makes an angle of 44 ◦ 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 39 N
and is horizontal.
The acceleration of gravity is 9.8 m/s^2

Determine the mass M2 in units of Kg