The histogram shows the reviewer ratings on a scale from 1 (lowest) to 5 (highest) of a recently published book. (a) Find the mean, variance, and standard deviation of the probability distribution. (b) Interpret the results. Probability Reviewer Ratings 0.5- 0.4- 0.3- 0.2 0.085 0.1 0.020 0.0- 1 -2 0.217 0.232 0.446 T 3 4 5 G- Rating