Rational number between two rational numbers and miscellaneous questions

Rational number ing between two given rational numbers

sum of two rational numbers is

In between two rational numbers, there are

A rational number between 3 and 4

Assertion : Rational number lying between two rational numbers a and b is a+b//2 . Reason : There is one rational number lying between any two rational numbers .

Between any two rational numbers there

Product of two rational numbers is

A rational number between -3 and 3 is

Consider the following statements : 1. There is a finite a number of rational numbers between any two rational numbers. 2. There is an infinite number of rational numbers between any two rational numbers. 3. There is a finite number of irrational numbers between any two rational numbers. Which of the above statements is/are correct?