SOMEONE PLEASE HELP ME (I have two questions and even if you only answer one that’s fine just please)

1. The scale of a map says that 2 cm represents 4 km. What distance on the map (in cm) represents an actual distance of 6 km?

2. Using the same scale from the previous question, (2 cm represents 4 km), What is the actual number of km that is represented by 5 cm on the map?

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.