Please answer all with full working out, i would like to check my answers. Thank you

(b) Taking 4 doses a day, how long will it take for Lachlan to finish the course of Drug C? [1 4 x 34 = 3 3:18 = 6 days 4. Each tablet of Drug C contains 80 mg of the actual drug. Each dose of Drug C is to be administered intravenously - once it has been dissolved in 0.12 litres of plasma. (a) Calculate the weight of Drug C that is administered per dose. [1] (b) Calculate the concentration of Drug C in the plasma, in milligrams per millilitre, and [2] expressed in scientific notation. 5 . Lachlan must drink plenty of fluids. If he drinks an average of 300 ml every hour for [1] 12 hours, how much fluid intake (in total) will you record on his fluid balance chart