Which of the following R code generates and displays a realization of a random variable with the Unif (0, 1) distribution? x. list=runif(n=5, min=-5, max=5) t. val=(mean(x. list) - 0)/(sd(x. list)/sqrt(5)) (u. val=2*pt(-abs(t. val), df=4)) Cu. val = 2^log(runif(n=1))) x. list=rnorm(n=5, mean=1, sd=2) t. val=(mean(x. list) - 1)/(sd(x. list)/sqrt(5)) (u. val=2*pt(-abs(t. val), df=4)) Cu. val=abs(rnorm(n=1)))