Review the word part chart and answer the questions that follow. Group I. If the root is a full word , the ending is usually -able. Group II. When the root is a full word except for a final e , the forms usually are spelled with -able. Group III. The suffix -able always follows i . Group IV. When the root has other forms built on the letter a , the -able form is used. Group V. When the root ends in hardc or g, -able is used. Group VI. When the root is not a full word, -ible is used. Group VII. When the word has an immediate -tion form, -ible is used. Group VIII. When the root ends in ns , miss , or soft c or g , - ible is used. Identify both the word ending and mnemonic group for the word exhaust . Use roman numerals for the mnemonic group. What is the correct word ending for exhaust ? Which mnemonic group does it belong to?