Winnie, a waitress, holds a 5.0-N tray stacked with twelve 3.5-N dishes in one hand. The
length of her arm from her hand to her elbow is 30.0 cm and her bicepts exert a force 5.0 cm
from her elbow, which acts as a fulcrum. How much force must her biceps exert to allow her to
hold the tray?