The exercise machine is designed with a lightweight cart which is mounted on small rollers so that it is free to move along the inclined ramp. two cables are attached to the cart - one for each hand. if the hands are together so that the cables are parallel and if each cable lies essentially in a vertical plane, determine the force p which each hand must exert on its cable in order to maintain an equilibrium position. the mass of the person is 61 kg, the ramp angle θ is 24° and the angle β is 28°. in addition, calculate the force r which the ramp exerts on the cart.