What Function Should Be Used for Generating Random Numbers from the Following

Essay

What function should be used for generating random numbers from the following distribution on the number of phone calls per hour?
$\begin{array}{lllll}&\text {A}&\text {B}&\text {C}&\text {D}\\&\text {\# of phone calls } & \text { P\# of phone calls)}&\text { \# of phone calls}&\text { P\# of phone calls) }\\1\\\hline2 & 1 & 0.10 & 1 & 0.10 \\3 & 2 & 0.40 & 2 & 0.50 \\4 & 3 & 0.30 & 3 & 0.80 \\5 & 4 & 0.15 & 4 & 0.95 \\6 & 5 & 0.05 & 5 & 1.00\end{array}$