Provide a line-by-line explanation for the PostScript code in Figure 4.14. Figure 4.14 % procedure to draw

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Provide a line-by-line explanation for the PostScript code in Figure 4.14.

Figure 4.14

% procedure to draw pie slice %arguments graylevel, start angle, finish angle /wedge { 0 0 moveto setgray langlel exch d

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