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What will be the output of the following C++ code? #include <iostream> #include <string> #include <cstdlib> using namespace std; template<class T> class A { T a; public: A(){} ~A(){} }; int main(int argc, char const *argv[]) { A <char>a1; A <int>a2; A <double>a3; cout<<sizeof(a1)<<endl; cout<<sizeof(a2)<<endl; cout<<sizeof(a3)<<endl; return 0; }