Question 1: How many license plates containing seven characters can be created from letters and numbers if the first three characters must be upper case letters from A to F and the last four must be digits from 0 to 9? The letters can be repeated but the numbers cannot.

Question 2: Grandma got a smart phone and needs help assigning the first four speed dial numbers to four of her 17 contacts. How many ways can the speed dial numbers be assigned?

Question 3: Eight tomato varieties are listed in a seed catalog. How many ways are there to select five packages of tomato seeds if each choice represents a different tomato variety?