Lin and Han's families provide money for their school lunch accounts.
• Han starts with $100 in his account. He spends $15 each week
on lunches.
• Lin starts with $25 in her account and does not spend any of it.
Her family adds $10 each week to her account.
1. At the end of 4 weeks, who has more money in their account?
2. After how many weeks will Han and Lin have the same amount
of money in their lunch accounts?