Identify the affix(es) and root word for each of the following: alternate biannual autobiography recognize

An Affix is a morpheme (a linguistic unit that cannot be divided into smaller meaningful parts) that attaches to the stem (root) of a word to form either a new word of a new form of the same word.

Affixes can be Derivational (the process of forming a new word from an existing word)  and Inflectional (the modification of a word to express different grammatical categories such as tense, voice or person) There are also Prefixes (affixes placed before the stem of a word) and Suffixes (affixes placed after the stem of the word).

These are the roots and affixes of these words:

Alternate:  

Root Word:  Altern.  

Suffix: –Ate which makes the word a verb.

Alternate: To perform by turns or in succession.  

Biannual:  

Root Word: Annual.

Prefix:  Bi- which means two (in this case two times).

Biannual :  Occurring twice a year.

Autobiography:

Root Word:  Biography,  

Prefix:  Auto- which means self  

Autobiography: The biography of a person narrated by him/herself.

Recognize:

Root Word: Cognize or Cognise. which means to perceive, become aware of or know.  

Prefix:  Re- which means again or back

Recognize: To perceive something or someone previously known.

Affixes can be class-changing and class-maintaining.

Class-maintaining affixes do not change the word class but change only the meaning of the word.

Class-changing affixes, when added to stems, immediately change the class of the word, making them as verbs, nouns, adverbs or adjectives.

So in the previous examples class-maintaining affixes and class-changing affixes were also used.

what are the words supposed to be listed?

may i ask what topic?