Homework Problems 6, STAT 705, Fall 2015.

Assigned 9/30/2015,  Due Wednesday 10/7/2015

Give R code to generate (and then test the distribution in order 
to check your work) 10,000 pseudo-random variates from each of 
the two following densities

(1) the density on  [0,Infty)  proportional to  exp(-x) + exp(-x^2/2)

(2) the density on  [0,Infty)  proportional to  min(exp(-x), exp(-x^2/2), exp(-x^3/3)).