I need a step by step explication on how to solve part 2 please.

5.4 Section Exercise 14 (calc) Question 6 of 7 (1 point) Attempt 1 of Unlimited View question in a popup Emission Inspection Failures If 2% of all cars fail the emissions inspection, find the probability that in a sample of 84 cars, 3 will fail. Use the poisson approximation. EO Part 1 of 2 Find the mean number 2 of cars that fail the emissions inspection in a sample of 84 cars. Round the answer to two decimal places as needed. 2 = 1.68 Part: 1 / 2 Part 2 of 2 Find the probability that 3 will fail. The probability is |0.2240 . (Round your answer to four decimal places.)