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(a). C 42 / a with origin at -4 and -1 at 1/4,0,1/4. |
(b). C 42 / a with origin at -1 and -4 at 1/4,0,1/4. |
(c). C 42 / a with origin at -1 and -4 at 0,1/4,1/4. |
(d). C 42 / a with origin at 42/a and -1 at 1/4,0,0. |