Help me to find the solution of 15 to 32 .

1532 Find: (a) the intervals on which f is increasing, (b) the intervals on which f is decreasing, (c) the open intervals on which f is concave up, (d) the open intervals on which f is concave down, and (e) the x-coordinates of all inection points. 15. 17. 19. 21. 23. 25. 27. 29. 31. f(x) =x23xl8 f0?) = (2% +1)3 f(x) = 3x4 4x3 fOC): x2 f(.x)= 3x2+x+l f(x) = tan10:2 1) (x2 x+ l)2 16. f(x) = 5 4x x2 18. f(x) = 5 +12x x3 20. f(x) = x4 5x3 + 92c2 22. f(x) = x212 24. f(x) = x4/3 girl/3 26. f(x) = x2/3 x 28. f(x) = xex2 30. x) =x31nx 32. f(x) = sin1x"3