answer Q2a and Q2b

Q2. Underlying follows lognormal distribution and is current at $100. You put on a broken-wing butterfly (BWBF) position with the following three legs: i. Long Ix 50 delta put where IV is 20%; i Short 2x 30 delta pur where IV is 25% ii. Long Ix 10 delta put where IV is 30% There are three months b/f expiration. Risk free rate is zero. Q2a. What are the strikes of the three puts you will be using? Q2b. What are the gammas for each leg of the BWBF spread as well as for the combination