Viable Count and Serial Dilutions - (Nov/21/2014 )

Hi everyone, if anyone could give me some insight regarding these questions, that would be amazing. Obviously the answers on the screenshots are wrong. Thank you. 

the first question: you've already diluted the soap 1:5. in order to prepare 1:50 soap you need to dilute a further 1:10...

second question: 150 million/ml is correct. to get 6 million divide 6/150=...ml (multiply by 1000 for ul)