Explaing the steps Clearly

Consider the following function. A(x) = 4- 3x Find the derivative of the function. -3 if x 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 = DNE DNE 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 =