.
If you make a sketch, you will find that the figure is the union of two trapezoids, oriented VERTICALLY.
They are separated by vertical line x= 3.5.
So, the area of the figure is the sum of areas of two trapezoids.
If you know the formula for the area of a trapezoid, then you should be able to complete the rest ON YOUR OWN.
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You may report me about two things:
1) If everything is clear to you from my post,
and
2) If you were able to complete this assignment on your own.
I will look forward hoping to hear from you.
If you will respond, then PLEASE refer to the ID number of this problem, which is 1175678.
If you will not refer, I will not know to which problem your response does relate.
If you do not respond, I will think that you are not interested in solving this problem.
Good luck (!)