A particle is at rest, and is acted upon by 3 forces, F, G and H.
Force F has a magnitude of 10N and is directed to the right and down, making an angle of 70degrees with the horizontal.
Force G has a magnitude of 15N and is directed to the right and up, making and angle of 50degrees with the horizontal.
Find the magnitude of the vector H and the angle it makes with the accute.