One sketch and three extrudes.
sketch on the top plane (I used the circle pattern for the holes)
extrude the following regions 7mm.
Using the same sketch, extrude these regions 25mm from the top plane.
And finally extrude the last regions 11mm (25-14=11) from the top surface.
Here is your part with one sketch and three extrudes. You could also do it other ways but this is what I felt was the most simple.