A drug containing 9943Tc (t1/2 = 6.05 h) with an activity of 1.50 Ci is to be

A drug containing 9943Tc (t1/2 = 6.05 h) with an activity of 1.50 μCi is to be injected into a patient at 9.30 a.m. You are to prepare the drug 2.50 h before the injection (at 7:00 a.m.). What activity should the drug have at the preparation time (7:00 a.m.)?