please answer the following question showing all working out:

The rate of change of the weight of a laboratory mouse t weeks (for 1 s t S 15) after the beginning of an experiment can be modeled as 13.765 w(t) = grams per week. 11 (a) Evaluate / WU') dt. (Round your answer to three decimal places.) 5 E grams (b) Interpret the answer from part (a). (Round your numerical answer to three decimal places.) A mouse |:] grams between the end of the -Select-- v and ---Select--- v weeks