Please help

Nutrition: animals. The mouse weights (in grams) of a random sample of 100 mice involved in a nutrition experiment are: Interval 41.5-43.5 43.5-45.5 45.5-47.5 47.5-49.5 49.5-51.5 Frequency 3 5 13 27 15 Interval 51.5-53.5 53.5-55.5 55.5-57.5 57.5-59.5 Frequency 17 13 2 ..... a. Find the mean of the weight of the mice. gms (Type an integer or a decimal. Round to two decimal places.) b. Find the standard deviation of the weight of the mice. gms (Type an integer or a decimal. Round to two decimal places.)