[5 mrks] The function 01:} = K [er\"t 3"\"), where a, b, and K are positive constants and b ;:> a, is used to model the concentration in g/cm3 of a dnJg t E [II], 10] days alter its been injected into the bloodstream. 3. Given that K = 2, a = 6 and b = 25, determine the time at which the concentration of the drug is at its highest given that this occurs 1when C'(t} = 0. Results one to be rounded to 6 decimal places. b. Use the result in part (a), nd what the highest concentration the drug reaches in the bloodstream. Results are to be rounded to 2 decimal places