plotting – Using NSolve and ContourPlot

Problem 6 a: Solve the equations x^2/9+y^2 /4=1, x^2-y^2=1 for {x,y}. b: Use NSolve to find approximate solutions to this set of equations. c: Now use 2-dimensional zooming and ContourPlot to find an approximation rounded to two places after the decimal point to this pair of equations.