Second: They are having trouble with their antibiotic, ampicillin. They need a final concentration of 60 in the agar when they pour it for their plates. The petri dishes hold 1 mL of agar each. They have a frozen stock of ampicillin at 1 gram per ml in water. They can prepare no more than 100 ml of agar at a time. The smallest volume they can measure accurately is 100 mu l. Outline for them how they should prepare their next batch of agar so that it contains the correct concentration of ampicillin (60 mu g/ml) when they pour their plates.