Need help Creating an example just like the on listed below. Please tell whether the answer is true or false

Example:

Define the relation R on Z+, the set of positive integers, as follows:

aRb if a and b are relatively prime (that is, the only positive integer that evenly divides both a and b is 1).

1. 8R12

True

False

2. 21R20.

True

False

3. There is a number such that x 1 and xRx.

True

False

4. There is a number x such that xR7.

True

False