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Question 2 5 pts Graph the function f (a) = x - 4 Type f'(a) and change a values. to answer the following questions. For intervals, use word infinity for symbol; no space after comma. Round fraction to 1 decimal. 1. the graph is decreasing on the open interval 2. the derivative value at x=2 denoted by f' (2) = 3. the graph is increasing on the open interval 4. the derivative value at x=5 denoted by f' (5) = 5. the derivative value at x=4 denoted by f' (4) =