Please help me with this question, I have attempted it numerous times but my professor doesn't agree with my work. I would like your input, please take into consideration the variables below. Thank you!

Q. The price of a stock is $40. The price of a one-year European put option on the stock with a strike price of $30 is quoted as $7 and the price of a one-year European call option on the stock with a strike price of $50 is quoted as $5. Suppose that an investor buys 100 shares, shorts 100 call options, and buys 100 put options.

a.Construct a payoff and profit/loss table

b.Draw a diagram illustrating how the investors payoff and profit or loss at expiation.