(09.01, 09.02, 09.03 hc) a submarine is traveling such that its position vector where s is in miles and t is time in hours. part a: find the speed of the submarine at 4 hours to the nearest tenth. (4 points) part b: find the acceleration vector of the submarine at 4 hours. (4 points) part c: what is the total distance traveled by the submarine in the first 4 hours? (2 points)