$4.$ Consider a $2$D game, in which a gun fires a cannonball. As part of the gameplay, you are modelling the effect of the air resistance on the cannonball. The mass of the cannonball is $50$kg$.$ The initial speed vector for the cannonball is $(100,50).($a$)$ give a graphical representation of all the forces acting on the cannonball as it flies through the air;