2. Answer these questions in sentences. a. What did all the children know? They knew the primary colours b. What did Adam also know? c. What example did Adam give? d. What secondary colour did Kate know? e. What did Harry do with his colours?

a. All the children knew the primary colours. This means that they were aware of the three main colours: red, blue, and yellow. These colours cannot be created by mixing any other colours together.

b. Adam also knew the primary colours. This means that Adam had the same knowledge as the other children.

c. Adam gave the example of mixing red and blue to make purple. Purple is considered a secondary colour because it is created by combining two primary colours.

d. Kate knew the secondary colour green. Green is obtained by mixing blue and yellow together.

e. Harry did not specify what exactly he did with his colours, so we cannot provide a specific answer to this question. However, it can be assumed that Harry used his colours for some sort of artistic activity or experiment, as colours are commonly used for those purposes.

To summarize:
- All the children knew the primary colours: red, blue, and yellow.
- Adam also knew the primary colours.
- Adam gave the example of mixing red and blue to make purple.
- Kate knew the secondary colour green.
- Harry's action with his colours is unspecified.