How do you beat stage 2 on questionaut

You have to answer at least 5 questions correctly to complete each of the 8 stages by filling the balloon with bubbles (fuel). A correct answer gives you another bubble. An incorrect answer will take away a bubble.

To start the stage:
Click all over the tree until all of the branches are out and all of the blossoms are open. The number bees will come buzzing around the tree. Click the beekeeper to get your questions.