Answer:
a) {-1, 4}
b) {-1, 1, 2, 3, 4, 5, 7, 8}
Explanation:
a) The intersection of M and D is all values in M that are also in D. In this case, it is only -1 and 4.
{-1, 4}
b) The union of M and D are all of the distinct numbers in both of the sets.
{-1, 1, 2, 3, 4, 5, 7, 8}