Rstudio help please very confusing

How do I use Rstudio? I am trying to:

#1. Calculate the right tail probability for any Z value between -3 to 3.
#2. Calculate the Z-score using any cumulative probability value between 0 and 1
#3. Generate a data frame with 500 observations and two variables.
Variable1: Normal distribution with (select any random mean and sd values)
Variable2: Chi-square distribution with a degree of freedom (any df=2 to 20)

Not sure if you still need help with this, but for #3, I would use the functions rnorm() and rchisq()

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