How do you become flexible ?

I need to be able to do the splits, a toetouch, & switchleaps in about a week. How can i become flexible enough to do that? or is that not possible..
Update: I need to be able to do the splits, a toetouch, & switchleaps in about a week. How can i become flexible enough to do that? or is that not possible..i can touch my toes when i'm stretching & i already stretch a lot. are their any specific stretches i can do ?
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