No, I don't think a comma is necessary in this sentence.
Answer: simple past
Explanation:
The simple past is used for an event that has been completed before the present moment in time.
The past perfect is not possble because is used for an event that happened
before another action in the past. She<u> had finished </u>school before she married.
The past perfect progressive is used for an action that was continuous before another action in the past. <em>She</em><u><em> had been studying</em></u><em> before she went to bed.</em>
The perfect progressive is used in present for an action that started in the past , continues in the present and will probalbly extend into the future
He <u>has been living</u> in LA for 10 years
Hey!
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Part A:

When Samara came up with the idea of creating a new park she didn't know anything about how she would come up with an idea and presenting it to the zoning board.
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Part B:

What I said above is what the answer is to Part B. If Samara wouldn't have gone to the library to learn how you would present an idea to the zoning board she would have never been able to create the park at all.
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Hope This Helped! Good Luck!
Pluto is not a planet it is a dwarf planet
Answer:
1. x-axis
2. y-axis
3. x-axis and shifted 2 to the right