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 (a) Find the mean, variance, and standard deviation of the probability distribution 0.5- 0 433 0.4- (b) Interpret the results 03- 0.219 0.246 Probability 0.2- 01 0.083 0 019 2 Rating (a) The mean is (Type an integer or a decimal. Do not round ) AYME The variance is 48 (Round to two decimal places as needed ) The standard deviation is