• Fred takes 1 hour to make a BB, 1 hour to make a DD and has 8 hours of labour a day
• Bamm-Bamm takes 1 hour to make a BB, hour to make a DD and has 8 hours of labor a day.

1)Construct a joint PPF using Fred and Bamm-Bamm

Fred retires and is replaced by Pebbles. Pebbles take 2 hours to make BB and 3 hours to make a DD

2) Sketch the new joint PPF with Pebbles and Bamm-Bamm.

Pebbles and Bamm-Bamm refuse to work more than 3 hours a day,

3) Sketch the new joint PPF with Pebbles and Bamm-Bamm after their new hours.