Ok. There are way too many for me to just give away the answers. Tell us what you're having trouble on. What specific number and I'll help you out.
#26-27 Take second derivative and use your sign changes to indicate concavity. #28 Take second derivative and set it equal to zero. #29 Acceleration is the second derivative of position. #30 Take derivative with respect to t on both sides and apply your point. #31 Chain rule
If you have any specific questions, please post them. Good luck.