The following contingency table shows inspection records for 720 units of a particular product. The records have been cross-classified by the inspectors decision (Pass and Fail) and the inspectors experience (Low, Medium, and High).

Decision Experience

Low Medium High

Pass 176 335 108

Fail 16 51 34

a-1. How many of the units passed inspection?

a-2. How many of the units failed inspection?

b. How many of the units were inspected by inspectors with high experience?

c. What proportion of the units were inspected by inspectors with low experience? (Round your answer to 2 decimal places.)

d. What proportion of the units were inspected by inspectors with medium experience and failed inspection? (Round your answer to 2 decimal places.)