The physical plant at the main campus of a large state university recieyes daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 51 and a standard deviation of 5. Using the Empirical Rule rule, what is the approximate percentage of lightbulb replacement requests numbering between 51 and 66? Do not enter the percent symbol. ans = 45.? X '36