Y4 English Suffixes Part II

Question:
Adding -ment to a root word, usually doesn't change the root word. However if the root word is 2 syllables and ends in y then you:
Question:
What do you get when you add the suffix "-ment" to the root word "argue"?
Question:
What do you get when you add the suffix "-ly" to the root words "true", "due", and "whole"?
Question:
Adding -ly to a root word, usually doesn't change the root word. However if the root word is 2 syllables and ends in "y", and has a consonant before the "y", then you:
Question:
What is the rule when adding -ly to a root word ending in -le?
Question:
What is the rule when adding -ly to a root word ending in -ic?