There are two firms that have discovered an instant cure to the common cold: Cureall and Theraquick. Theraquick has the exact same effectiveness as Cureall, but is more expensive to produce. Whereas Cureall's cost curve is C(9)= 209 , the cost curve of Theraquick is (9+) =609 . Demand for a cure to the common cold is P = 600-20 . Both Cureall and Theraquick are owned by profit maximizing firms who compete under Cournot competition. We use subscript "c" and "t" to denote Cureall and Theraquick, respectively. Note: There are two firms that have discovered an instant cure to the common cold: Cureall and Theraquick. Theraquick has the exact same effectiveness as Cureall, but is more expensive to produce. Whereas Cureall's cost curve is *C(q_c) = 20q_c' , the cost curve of Theraquick is "C(q_t) = 60q_t' . Demand for a cure to the common cold is 'P = 600 - 20' . Both Cureall and Theraquick are owned by profit maximizing firms who compete under Cournot competition. We use subscript "c" and "t" to denote Cureall and Theraquick, respectively. Note: 1. Please do not input any notations (such as"/", "()", "$" and ") in the answer. In particular, do not write your answer in fractions, like "1/2"; instead, you should write "0.5". The system cannot recognise any notations other than "-" and "+". 2. Please keep two decimal places in your numerical answers. For example, your answer can be "1234.56". But do not input "1234.56$" or "1,234.56". 3. Please note that the answers can be either positive or negative, even if there is a positive sign in the front of the blank. For example, a best response function can be written as q1 = 10+(-2)q2. So, in your answer, the coefficient of q2 should be "-2", rather than "2" or "(-2)". a) Cureall's best response function is 9+ b) Theraquick's best response function is 9t c) In the Nash equilibrium, the quantity of production of Cureall is d) In the Nash equilibrium outcome, consumers' surplus is