I need CHEERLEADING help!!!!!! PLZ!!!!!?

ok so im in the 6th grade. next year i can be a cheerleader and try-outs are in like a week. i have to be able to do the splits and a cartwheel and a roundoff. now ive never done cheerleading or gymnastics before so i dont know how to do these things!!! i need to know how to get more flexible and do the splits. (in our tryouts the splits, cartwheel, and roundoff count for 10 points each.) so if anyone knows how to help me, plz do!!!!! thx alot!!!!!!