There were 7 frqs, lucky none of them are hard, and only 2 were changed.

Number 7 is BY FAR the hardest.

Typos:

Make sure you justify EVERY SINGLE one of the ones that are like "Whats the max" or "Whats the min" or "Whats the Concavity" with something like "The graph of the derivative changes sign from positive to negative".

Use this key for at least 18/20.