Ineed to know question 2, 3 and 4. i feel like i’m doing it wrong.

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?