A nutrient agar plate labeled 10-5 ml had 154 colonies

Question

Please evaluate the accurate solution of all parts of the given question

Question 1- A Nutrient Agar plate labeled 10-5 mL had 154 colonies after incubation.

Part 1- What was the cell density in the original sample?

Part 2- What volume was used to inoculate this plate?

I want experts help to compute the cell density in the original sample.