9) I recently purchased 2 call contracts on Dell with exercise price of $80

Yes, there will an adjustment to our call option position.

4 for 3 stock split means for every 3 shares held by the shareholders they get an additional share. And, the price of the shares are decreased proportionally.

The strike price of $80 is adjusted to be equal to $80 * 3/4 = $60

Before the split 2 call contracts controls 200 shares of Dell with strike price of $80.

After the split the number of contracts is increased to 2 * 4/3 = 2.666666666667 or 266.6666666667 shares of Dell

So, that the contract value remains the same.

The contract value before the split: 200 shares of Dell * 80 = $16,000

The contract value after the split: 266.6666666667 shares of Dell * 60 = $16,000

Summary:

After the split, the strike price is decreased to $60 and the number of contracts increased to 2.666666666667.