Given two sets A equals left curly bracket 1 comma 2 comma 3 right curly bracket and B equals left curly bracket a comma b comma c right curly bracket. Let A cross times B be the cartesian product of A and B. Answer part (a) and (b) with T if true or F if false. a. left parenthesis a comma b right parenthesis not an element of A cross times B. Enter answer b. empty set subset of A cross times B. Enter answer Answer part (c) and (d) with a number. c. How many elements are there in the set A cross times B? Enter answer d. What is vertical line P left parenthesis A cross times B right parenthesis vertical line? Enter