Overnight temperatures The table shows the hourly temperatures recorded in one location overnight.

Recorded Temperatures
Time
Temperature (°F)
2 a. m.
-4.5
3 a. m.
-5.0
4 a. m.
-6.5
5 a. m.
-6.0
1. Which is the least temperature?

and pls give me an explanation

Consider u = {x|x is a negative real number}which is an empty set? o {x|x eu and x has a negative cube root}o {x|x eu and x has a negative square root}{x|x eu and x is equal to the product of a positive number and -1}{x|x eu and x is equal to the sum of one negative and one positive number?