Add a method of cubicBezierCurve called drawBasisFunctionsWithParm that draws the graph of each basis function next to its corresponding control point. After we get this working correctly, we implemented the next step and showed the current value of that basis function at the current parameter.  We fixed a careless mistake that went unnoticed in the previous version.  We were essentially hard coding width and height equal to drawingCanvas.width and drawingCanvas.height.