Clarification on problem Homework #4, problem 3

It should be a divide by 10 (decimal). This means that the counter should count from 0 to 9 then back to 0 (i.e. 0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, 1000, 1001, 000). It only requires one and gate.