You receive the following prescription. Demecarium Bromide 0.125% Benzalkonium chloride 1:5000 Sterile isotonic buffer qs ad 15mL a. How many milligrams of demecarium bromide do you need to make this prescription? b. What is the volume of you need to as to with sterile water to make an isotonic solution of just the demecarium bromide? The sodium chloride equivalent of demecarium bromide is 0.12. C. The benzalkonium chloride is available to you as a 1% stock solution. How many milliliters of this stock solution will you put in your prescription