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Question 1 5 pts Graph the function f (ac) = - 23 + 2x2 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. A. the graph is decreasing on the open interval and Enter left interval first) B. the derivative value at x=-1 denoted by f' (-1) = C. the graph is increasing on the open interval D. the derivative value at x=1 denoted by f' (1) = E. the derivative value at x=2.5 denoted by f' (2.5) =