2 4 4 8 6 12 a Determine the polynomial function of least degree whose graph passes through the given points p x b Sketch the graph of the polynomial function showing the given points y 15 15 10 10 5 15 10 10 15 15 y 10 5 10 15 5 5 10 10 15 15 O 15 10 5 15 10 5 15 10 5 10 15 5 y 15 10 5 5 10 5 5 10 10 15 15