I. Type Equivalence. Consider the following type declarations. TYPE Al integer; A2 pointer to float; A3 pointer to integer; Tl structure x : integer) T2 structurex : A; T3structure a pointer to intgerb pointer to long; ) T4 : structure b : pointer to long: T5structure a : pointer to T6; b : pointer to T5; c pointer to T9; ) T6 structure a pointer to T5; b : pointer to T6; pointer to T10; T7 structure a pointer to T7 b : pointer to T5; cpointer to T9;) T8 structure a : pointer to T5; b : pointer to T8; pointer to T10 next: pointer to integer ) a pointer to integer /1 array 4 rows 5 columns T9 : array [41151 of T5; T10: array [4151 of T7: Determine which types are structurally equivalent. Show your work. (Note: the definition of structural equivalence that I gave in class is a permissive definition that few languages support and is different from the one in the textbook. You should use the definition I gave)