Please help me on this

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

How many solutions does the nonlinear system of equations graphed bellow have?

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).