An unscrupulous structural engineer left a Mohr$$s Circle combined stress problem

incomplete $($their incomplete work is shown below$)$; however, the work is complete enough to derive

all three pertinent stress elements from the available information. Derive all three stress elements,

namely $($a$)$ the initial stress element, $($b$)$ the principal stress element, and $($c$)$ the maximum shear

stress element, from the provided information. Ensure each element is adequately oriented & labeled.