Can someone help answer these C++ questions.

How is overloading involved with constructors? What is an initializer list with respect to constructors? Give an example of using an initializer list for a Rectangle class. (Assume a Rectangle is initialize-able via its lower-left and upper-right corner points.) Initializer lists aim to make class object construction more efficient. How? In the following code fragment: explain what object(s) is/are being constructed from what it/they is/are being constructed which constructor(s) will be used to perform the construction(s) (See the explanation in #18 about what a rational number is.) void f(Rational a): void f(Rational & a): inline Rational g(void) (Rational t: return t: } //in same function...maybe main? (Rational x: Rational y(4, 3): Rational z = y: Rational w(x): Rational r(-2): f(x): x = g():)