33. Let L1 and L2 be subsets of {a, b}*. a. Show that if Li S L2, then Li SL b. Show that LiULS (L, UL2)* c. Give an example of two languages L, and L2 such that LUL2 + (LUL2)*. d. tone way for the two languages LUL and (L1U L2)* to be equal is for one of the two languages L1 and L2 to be a subset of the other, or more generally, for one of the two languages L; and L; to be a subset of the other. Find an example of languages L and L2 for which neither of L1, L is a subset of the other, but LULE (LU L2)* Textbook p. 39 #1.33c. Also, explain why the left hand side and right hand side are not equal for the example you gave