10 While studying the effects of epipens to fight allergies , scientists measured the amount of epinephrine in the patient's body. Define the function E(t) to be the mean epinephrine plasma concentration in the patient's blood in mcg/L (micrograms per litre) measured t minutes after injection. (26 marks) 0.4- 0.2 0 30 60 90 120 150 180 time (in min) 0 7.5 15 22.5 30 37.5 45 60 90 120 180 epinephrine (in mcg/L) 0.39 0.32 0.295 0.305 0.27 0.22 0.16 0.1 0.06 0.03 (a) Estimate E'(60). (6 marks)