Find if statements are T or F and give explanation?

Am I on the right tracK

-5)

False. Not all real numbers are greater than or equal to -5. An example would be x=-4

True. There is, at least one, real number z that is less than one. An example: z = -1

False. For example, let m=8 and x = -1. -8 != 8.

False. Let x = 1 and t=10