Need help with calculus 1 work so no integrals to solve. Thank you.

(7) (7-10) Determine the intervals on which the function is concave up and intervals on which the function is concave down. Before you submit your solutions, check your answers by graphing the corresponding functions. No need to include these graphs. f(I) = 23. (8) f(x) = ze *. (9) f(x) = x - 2 sin r defined on the interval (0, 37). (10) f(x) =