Question: Consider the declarations structure Z = struct type t = int; val z = 0 end; structure A = Z : sig type t ;

Consider the declarations structure Z = struct type t = int; val z = 0 end; structure A = Z : sig type t ; val z: t end; structure B = Z :> sig type t = int ; val z: t end; structure C = Z :> sig type t; val z: t end; in the SML Modules language. Explain the behavior of the SML interpreter on inputting each of the expressions Z.z = A.z; Z.z = B.z; Z.z = C.z;

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