A lunch tray is being held in one hand, as the drawing below illustrates. L The mass of the tray itself is 0.199 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.25 kg plate of food and a 0.257 kg cup of coffee. Assume L;=0.091m, L,=0.129m, L3=0.232m, L4,=0.369 mand L5 = 0.401 m. Obtain the force T exerted by the thumb. Both the thumb and the finger forces act perpendicular to the tray, which is being held parallel to the ground