Which set of systems of equations represents the solution to the graph?
f(x)=x²+2x+1
g(x) = -x² + 1
f(x)=x²+2x+1
g(x)=x²-1
f(x) = -x² + 2x + 1
g(x)=x² +1
f(x) = -x² + 2x + 1
g(x)=x²-1