First one is master brake cylinder, brake fluid tank, and brake power assist ( I think it is called that)- black container. You have the part sideways by the way.
From where in the car did the second piece come?
That could be anything
okay..the second picture is a part of the first picture.we're required to draw this using SolidWorks..some parts i not sure how to draw..because some planes is inclined one and I don't know to draw the incline plane.
The second component is a mounting bracket of some sort. If you could upload some different views of the power brake unit, you might get a better response.
The second part is a bracket that goes between the nuts and the master cylinder and most likely holds a heat shield so the exhaust doesn't convectively rise and heat the master cylinder.