Sale of ISO stock after paying AMT

I have been using TurboTax for over 10 years. In 2020 I sold shares of a stock that I got by exercising QUALIFIED ISO employee options in 2014, 6 years ago. When I exercised the QUALIFIED ISO options, I had to pay AMT on the difference between the option price, $1.61, and the then value of $64/share. In 2020 I sold the shares for $75/share with a fee of $0.33/share.

Are these shares long term capital gains, owned 6 yr.?

Is the basis price $64 (paid ATM on this) or the original $1.65, or something else?

How to get credit for the AMT already paid?

How to account for the sales fee of $0.33/share, (add to basis?)?

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