Question

please help with a few questions!

1.What is the solution set of {x | x < -5} ∩ {x | x > 5}?

all numbers less than -5 and greater than 5
the numbers between -5 and 5
the empty set
all real numbers

2.Which of the following describes the graph of {x | x ≤ 1} {x | x ≥ 4}?


closed circles on 1 and 4 with a line segment between
closed circles on 1 and 4 with arrows pointing outward
the entire number line
no solution

3.Write a compound inequality to represent all of the numbers between -4 and 6.