Q4. Delta and Gamma with Uniform Distribution (20 points) Current underlying price at 100, and you expect price at expiration follows uniform distribution with mean absolute deviation of 20. You short 10 PUTs with strike at 90.

Q4h. For Q4g, how much of the total PnL is from option position, and how much is stocks, when underlying moves from 100 to 120?

Q4i. If underlying moves up from 100 to 120, If you need to re-hedge to flatten delta with underlying shares, what trade do you need to do in the shares?