(1 a) Does the speedometer of a car measure average speed or instantaneous speed? Explain. b) Describe situations in which the instantaneous speed and the average speed would be the same. (2 State if each situation represents average rate of change or instantaneous rate of change. Give reasons for your answer. a) At 3 p.m., the plane was travelling at 850 km/h. b) The average speed travelled by the train during the 10-h trip was 130 km/h. () The fire was spreading at a rate of 2 ha/h. d) 5 s after an antiseptic spray is applied, the bacteria population is decreasing at a rate of 60 bacteria per second. e) He lost 4 kg per month over a 5-month period. f) After being heated for 2 min, the water temperature was rising at 1"C/min. (3) Which method from Examples 1, 2, and 3 is the most accurate for finding the instantaneous rate of change? Explain