Given the following variable and function declarations, write the function call and the functions header:

a. double price = 22.95, increase = .10;

void changePrice(double&, double);

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b. double price = 22.95, increase = .10;

void changePrice(double* , double);

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c. int age = 23;

void changeAge(int&);

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d. int age = 23;

void changeAge(int*);

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