Suppose Charlene Brewster has times (in seconds) of 8.4, 8.7, 8.3, 8.6, 8.7, 8.5 and a performance rating of 85%.

The normal time for this operation = _______ seconds (round to two decimal places).

Based on the normal time and the observed times, Charlene's work performance should be rated as (slower than normal, same as normal, or faster than normal).