6. A call option has an exercise price of $45 and a premium of $4. If the price of the underlying stock is $60, the total payoff of the option is ____?

7. A put option has an exercise price of $20 and a premium of $2. If the price of the underlying stock is $11, what of the total payoff of the option?

8. You write a call option with an exercise price of $67 and a premium of $7. If the price of the underlying stock is $60, your total payoff is ____?