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5. Find three relation from {1, 2} to {6, 7} that are NOT functions. 6. 3. Find all relations from {4, 5, 6} to {1, 2}. b. Find all functions from {4, 5, 6} to {1, 2}. c. What fraction of the relation from {4, 5, 6} to {1, 2} are functions? 7. Define a relation M from R to R as follows: For all real numbers x and y, (x, y) e M means that y2 = x. Is M a function? Justify your answer. 3. Determine whether the given sets are binary operations under addition, subtraction, multiplication, division and exponential. Justify your answer. a. set of natural numbers h. set of integers c. set of rational numbers d. set or real numbers 9. set of complex numbers