1) Earlier, when at home covid test kits were given to the public, there were places that people could drive by to pick up test kits. Suppose the graph shows the rate rot), in cars / hour, at which cars are driving by to pick up test kits at a certain station, where t is the number of hours since 8 am. I'll} a) What are the units of f: r(t)dt ? Explain what I: r(t)dt represents. Be specific and include time in your discussion. (2 pts.) b) If 150 cars were given test kits by 9am, give an expression for the total number of cars that were given test kits by 11 am. Include 150 in your expression. (2 pts.) c) Give an expression for the average rate at which cars are driving by the station during the 8 hours that the station is open. Include units in your answer. (2 pts.)