Volumes with Cross Sections: Squares/Rectangles Practice Test

What is the correct volume integral for the solid with base between $y=x^2$ and $y=4$, square cross sections perpendicular to the $x$-axis?

What is the correct volume integral setup if the base is bounded by $y=\cos x$ and $y=0$ on $0,\tfrac{\pi}{2}$ with square cross sections perpendicular to the $x$-axis?