Walk the dog: 10:00
Go shopping with Mom: 1:30
Eat lunch: 12:00
Play outside: 10:15

This is the order in which Sam will do each thing.

1. Walk the dog. (The clue tells us that he will walk the dog first.)
2. Play outside (The clue tells us that he will play outside before lunch.)
3. Eat lunch (The clue tells us that he will eat lunch at noon.)
4. Go shopping with Mom. (The clue tells us that he will go shopping after lunch.)