4. [-/1 Points] DETAILS SCALCET9 4.1.034.EP. MY NOTES PRACTICE ANOTHER Consider the following function. A (x) = 5 - 7x Find the derivative of the function. fx Find the values of x such that A'(x) = 0. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) X = Find the values of x in the domain of A such that A'(x) does not exist. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) X : Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) X : Need Help? Read It Submit