Here's the Coin class definition. Complete the missing parts of the implementation. class Coin public: Coin(double value); -Coin(); double value() const; static int coins(); private: double m value; static int num_coins; }; coin.cpp 1 #include 2 #include "coin.h" 3 using namespace std; 4 5 Coin::Coin(double value) { m value = value; } 6. 7 8 9 10 Coin::-Coin() { } 11 12 13 14 double Coin::value() const { return m value; } Demo.cpp 1 #include 2 #include 3 using namespace std; 4 5 #include "coin.h" 6 int main() { { Coin a[] = { {.1}, {.25}, {.25} }; cout « "#1 coins: " « Coin::coins() « endl; } cout « "#2 coins: " « Coin::coins() « endl; { Coin a[] = { {.1}, {.25}, {.25}, {.05}, {.50}, {.01} }; cout « "#3 coins: " « Coin::coins() « endl; } cout « "#4 coins: " « Coin::coins() « endl; } 7 8 9 10 11 12 13 14 15 16 17 18 19