Kristen the first child, took the path of four year college with a full-time job upon graduation and started saving immediately. She faithfully put $100 a week into an investment account for the next 10 years. She then decided to start a family and be a stay-at-home mom, so she could no longer afford her $100 weekly investment. She earned an average return of 7% compounded weekly.

1. After ten years, how much did Kristen accumulate in her investment account?
2. If Kristen didn't spend any of her investment, how much did she accumulate over the next twenty years (total 30 years) if she continued to earn 7% interest (lump sum investment)?