4. A Firkin is an old British unit of volume equal to 9 gallons. Use unit conversion to show how many cubic meters there are in 6 Firkins. Start by converting gallons to cubic inches. Note: There are 231 cubic inches in one gallon. 5. A particle moves along the x axis according to the equation x = 2.00 + 3.00t - 1.007, where x is in meters and t is in seconds. At t = 3.00 s, find (a) the position of the particle, (b) its velocity, and (c) its acceleration. 6. A student throws a set of keys vertically upward to her sorority sister, who is in a window 4.00 m above. The second student catches the keys 1.50 seconds later. (a) With what initial velocity were the keys thrown? (b) What was the velocity of the keys just before they were caught