What does Lulu do on Fridays?

Brief Explanation:

Step-by-step Solution:

1. Step 1: Find the column corresponding to 'FRI' (Friday).
2. Step 2: Check the 'drink milk' row; there is a checkmark.
3. Step 3: Check the 'play tennis' row; there is a checkmark.
4. Step 4: Check the 'watch cartoons' row; there is no checkmark.
5. Step 5: Check the 'eat vegetables' row; there is a checkmark.
6. Step 6: Check the 'read a story' row; there is no checkmark.

Answer: Lulu drinks milk, plays tennis, and eats vegetables on Fridays.