The key answer of exercise 10

b)

1. -ion → frustration, fascination
2. -ment → embarrassed, disappointed, amusement
3. -ity / -ety → creativity, anxiety, spontaneity
4. -ness → awkwardness, nervousness
5. other → anger, worry

c)

1. frustration, fascination
2. embarrassed, disappointed, amusement
3. creativity, anxiety, spontaneity
4. awkwardness, nervousness
5. anger, worry

d)

1. -ion, -ity / -ety → the stress is on the syllable before the suffix.
2. -ment, -ness → the stress is on the same syllable as in the adjective.