Liam is thinking of a two-digit number. He provides four statements about it, and exactly three of the following four statements are true:
(1) It is a multiple of 15.
(2) It is an even number.
(3) It is greater than 70.
(4) The sum of its digits is 9.
This information is sufficient to uniquely determine the number. What is the units digit of Liam's number?
0
2
4
6
8
