#### Answer

roster form: P={1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
set-builder notation: P={x | x is a natural number, x $\lt11$}

#### Work Step by Step

The roster form lists each natural number that is less than 11, the values that satisfy the criteria.
The set-builder notation lists all the criteria that the members of the set must satisfy.