Question 4 Arrays Collections Manipulations

Question

Hi,
Correspondingly, can someone please answer question number 4. Thanks!

Answer 1

Ok, so first, add "z" to the array:
arr << "z"

next, remove all duplicates:
arr.uniq!

finally, output the number of its elements:
puts arr.size

Hope this helped

Answer 2

Hi Miles! I'll try to help, just post the question, if you can, please.

Answer 3

Here's the question to number 4:

Fill in the blanks to add "z" to the array, remove all duplicates, and output the number of its elements.
arr = ["a", "b", "a"]
<< "z"
arr.
puts arr.
size remove freeze uniq! arr