Opportunity Cost problem!!! Help!!!?

Question

1. Why is the opportunity cost of going to medical school likely to be greater than the opportunity cost of going to college?
2. Why is the opportunity cost of a woman with a college education having a child greater than the opportunity cost of a woman with just a high school education having a child?

Answer 1

1. My guess is that medical school is longer? So the opportunity cost is what you can be doing during that time, like the years of wages you don't earn.

2. - that one is easier - the opportunity cost again is lost wages while away from work - and a better educated person on average earns more.