TYPE DECLARATIONS T1nt; T2 = pointer to T1; T3pointer to int; T4 pointer to string: T5 = struct { a int; b: array [1.5] of T6; T6 struct a T1; b: array [1..51 of T5; T7struct t a: T5 b: aray [1..5] of T6; Determine which types are structurally equivalent. Show your work. Problem 4 Consider the type declaration A= struct { a: int; next A; 1. Assume that for a struct T, the size of an object of type T is equal to the sum of the sizes of the fields of the structure. Write an equation that needs to be satisfied by objects of type A above assuming the size of int is 4. Explain why if an object of type A exists, it must be infinite Explain how it is possible to support type A in a programming language without having to allocate infinite memory for objects of type A (Hint: consider how an object of type A can be used and how the fields of A are accessed) 2. 3