Question 10'. A group of patients is given a certain dose of a drug once. Two measurements of concentration of the drug in the blood are taken 24 hours apart to determine the rate at which the drug is removed from the blood stream. The measurements are glven below. '5 '- r 111131 measurement ' ' 1 1 .5 0.2 0.6 (a) Write a DTDS of the form $t+1 = acct for drug removal and find the value of a. (b) For patient 1, how long will it take until the drug concentration is below 0.1? (c) How long does it take for the initial concentration to decrease by 50%? ((1) Now patients are given a dose every 24 hours, with a. as in part (a). How much of the drug h concentration is 6? Le, we have the DTDS n+1 = arc; + b as to be given so that the steady state