A)
The inequation is as follows:
To get de solution, we can do:
To give the solution in a number line, we first draw a line, marke the "1" in it and mark the line belowe "", since the solution is the numbers less than 1. Also, the mark in the "1" should be a open dot, meaning, it is not filled, which indicates that "1" is not included in the set.
So:
B) To write the solution in interval notatio, we put the start and the end of the set. Since it goes all the way to minus infinity, we put as:
When it is infinite, we use "(" to indicate it is open set in this side. The other ")", beside the "1" indicates that "1" is not included.