Aweb-site asks users to create a 5-symbol pin code where first and second symbols are any letters from the english alphabet and next 3 symbols are any digits. how many different pin codes can be created?

Robert has 78 tomato lants and 56 cucumber plants .he wants to plant them in rows that only have one type of plant in each row with the same number of plants in each row. how many plants should he put in each row and how many rows of each type of plant will he need