Three brothers, Andy, Bob, and Curly, take a taxi together home from the airport.
Their homes lie along the same route;
• Andy’s is 21 km from the airport,
• Bob’s is 42 km, and
• Curly’s is 63 km.
If the taxi fare is $2.00 per km, try to find at least two possible fair ways for each
of the three travellers to pay the driver (not including the tip)?