Final answer:
The words formed by adding suffixes to the given stems are electrician, editor, psychologist, baker, and counselor.
Step-by-step explanation:
The task involves using knowledge of word formation, specifically transforming verbs or nouns into nouns that represent people who perform a certain action or have a certain occupation. By adding appropriate suffixes like -er, -ist, -or, and -ian to the provided stems, new words are formed.
- A(n) electrician installs and repairs electrical systems.
- A(n) editor works for a newspaper or a magazine.
- A(n) psychologist studies the way people think, feel and learn.
- A(n) baker makes and sells bread for a living.
- A(n) counselor listens to people's problems and gives advice.