List the elements in each set. See Example 1. {z|z is a natural number greater than 4}

CONCEPT PREVIEW Fill in the blank(s) to correctly complete each sentence. The set containing no elements is the _______, symbolized _______.

List the elements in each set. See Example 1. {x|x is a whole number less than 6}

List the elements in each set. See Example 1. {z|z is an integer less than or equal to 4}

List the elements in each set. See Example 1. {a|a is an even integer greater than 8}

List the elements in each set. See Example 1. {k|k is an odd integer less than 1}

List the elements in each set. See Example 1. {p|p is a number whose absolute value is 4}