$4-7.$ Graphically position the links for the shearing mechanism in the configuration shown in Figure P$4\mathrm{.}7.$ Then reposition the links as the $\backslash (0\mathrm{.}75-\backslash$mathrm$\{$in$\}\backslash ).$ crank is rotated $\backslash (100^\{\backslash$circ$\}\backslash )$ clockwise. Determine the resulting displacement of the blade.

FIGURE P$4\mathrm{.}7$ Problems $7,8,41,57,64,71,77,83.$

$4-8.$ Graphically position the links for the shearing mechanism in the configuration shown in Figure P$4\mathrm{.}7.$ Then reposition the links as the blade is lowered $0\mathrm{.}2$ in $.$ Determine the resulting angular displacement of the crank.