Can someone explain how do this this?

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25

Use a standard normal table to determine the probability. give your answer as a decimal to four decimal places. −1.5< < 1.5)