Please help will give brainliest

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract