a. In Check Your Progress 2 the circle relation Cwas defined as follows For any (x, y) ERX R, (x,y) E C means that x2 + y2: 4 %3D Is Ca function? If it is, find C(0) and C(2). b. Define a relation from R to R as follows: For all (x, y) ERXR, (x,y) EM means that x² + y = 0. Is Ma function? If it is, find M(-1) and M(0).

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