Need some help

The histogram shows the reviewer ratings on a scale from 1 (lowest) to 5 (highest) of a recently published book Reviewer Ratings 0.5- 0.433 (a) Find the mean, variance, and standard deviation of the probability distribution, 0.4- (b) Interpret the results. 03 0.211 0.236 Probability 0.2 0 098 0.1 0.022 0 01 2 15 Rating (a) The mean is (Type an integer or a decimal. Do not round ) The variance is (Round to two decimal places as needed ) The standard deviation is