The rows of staples AB contained in the stapler is glued together so that the maximum shear stress the glue can withstand is 12 psi. Determine the maximum force F that must be placed on the plunger in order to shear off a staple from its row and allow it to exit undeformed through the groove at C. The outer dimensions are shown in the figure below. The thickness of the staple is 0.05 in. Assume all the other parts are rigid.

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