Need help with part a and b

a. On what time intervals is the concentration of the drug increasing? 'b. On what intervals is it decreasing? ' "'*- ' , ,7 a. identity the open intervals where K(t) is increasing. Select the correct choice below and. if necessary. ll in the answer box to complete your choice. 0 k The function is increasing on the interval(s) f]. (Type your answer in interval notation. Simplify your answer: Use integers or fractions for any numbers in the expression Use a comma to separate answers as needed.) 0 B. There are no intervals where the function is increasing. I). identify the open intervals where K(t) is decreasing. Select the correct choice below and. it necessary, ll in the answer box to complete your choice. 0 A- The function is decreasing on the intervaKs) [i . *r . rs (Type your answer in interval notation. Simplify your answer. Use integers or fractions for any numbers in the expression. Use a comma to separa e a-nswe as needed) 0 B. There are no intervals where the function is decreasing