[QUESTION] How to solve this system for failure? Shear and Bending stresses at the mid point.

https://imgur.com/a/3PVwtE9

Q - A mass M is suspended through a hollow PVC pipe of outer and inner diamters D1 and D2 respectively. A solid cylindrical cast iron nail of diameter d passes radially through the pipe and the support clamp of thickness t. For what values of M

a.) The nail would break at the centre

b.) Pipe has shear failure at the cross section of the hole

submitted by /u/DarkSoulMasterFrodo
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