The given part is required to be blanked from a stainless steel sheet of $4$ mm thickness, having a shear strength of $275$ MPa $.$ The clearance allowance for the given steel is $0\mathrm{.}075.$

a$)$ Estimate the press capacity required to perform this blanking operation.

b$)$ Sketch the required die and punch, then determine their dimensions for blanking.

c$)$ Given that scrap allowance between blank and sheet edge and between two blanks is $5$ mm $,$ and one product is required per press stroke, how can the die set be arranged for most efficient blanking: long side vertical $($as in the figure$)$ or long side horizontal? Justify your answer numerically.