I need help solving these problems

Question 11 1 pts Suppose a stream is discovered whose water has remarkable healing powers. You decide to bottle the liquid and sell it. The market demand curve is linear and is given as follows: P=30-Q The marginal cost to produce this new drink is $3. What will be the price of this new drink in the long run if the industry is a Bertrand duopoly? Question 12 1 pts Suppose a stream is discovered whose water has remarkable healing powers. You decide to bottle the liquid and sell it. The market demand curve is linear and is given as follows: P = 30 - Q The marginal cost to produce this new drink is $3. What will be the price of this new drink in the long run if the firms in the industry collude with one another to maximize joint profit? O $3 O $9 O $12 O $16.50