Root = pos
Prefix = com
Suffix = ltion
Step-by-step explanation:
In a word, prefix is the part of the word which comes before the stem of the word. It is an affix which comes before the stem of the word. Adding it to the beginning of one word changes the meaning of that word.
Suffix is added to the end of the word. Adding it to the word also changes the meaning of the word like with the adding of prefix. Some examples of this are er, ly.