Identify the rule and find the next number.
Questions:
Q1: What comes next? 4, 7, 10, 13, ___
Q2: What comes next? 20, 15, 10, 5, ___
Q3: What comes next? 31, 28, 25, 22, ___
Q4: What comes next? 5, 9, 13, 17, ___
Q5: What comes next? 100, 95, 90, 85, ___