Consider the equation 3:r5 + y + 7 a) Find du by hand. b) Use Geogebra CAS to check your answer to (a): You will use the ImplicitDerivative() command. To use it, you need to first rewrite the equation by bringing all terms to one side (e.g., 3x5 + _ O). The expression you get on the nonzero side can then be entered in the brackets of the command (i.e., ImplicitDerivative(3x5 -4- Y2 7)). (12 y c) Use Geogebra CAS to calculate .