Use the following information and space provided below to answer question 18 and 19 Mr. Scaber forgot his 4 digit password for his cell phone. He remembers that the second digit in his password is either a 2 or a 3. He remembers that definitely did not use the word 0. If he guesses the incorrect password he has to wait 30 seconds before his next attempt. 18. How many potential passwords does he have to guess? [3 marks] 9 2 9 9 = 1458 19. Mr. Scaber only has 12 hours to figure out his password. If he guesses passwords non-stop is it likely he will guess the correct one? Support your answer with calculations and reasoning. [2 marks] 20. Mr. Scaber is asked to determine how many ways he can arrange 5 letters chosen from EDMONTON. Below is the expression he creates to solve the problem. Describe how he formulates this solution and where the numbers come from. [3 marks] 8! 3!212