There are three different roads from Cupids to Harbour Grace and five different roads from Harbour Grace to Heart's Desire.
a. How many different routes are there from the Cupids to Heart's Desire via Harbour Grace?
b. How many different round trips are there from the Cupids to Heart's Desire and back, passing through Harbour Grace each way?
c. Repeat (b) if you don't want to drive on any road more than once.