The function F(x)= _-cos(x) for 0 > is the CDF of a random variable X. 2 Using R: a) Using R, create a user-defined function for F(named F) in the interval [0, x]. F=function(xX(1-cos(x))/2} X b) Using this F, find the probability that X > 1.5 .5354 c) Using F, find the probability that X