what would be the formula to calculate PDF and CDF

\begin{tabular}{|l|l|l|} \hline 1 & & \\ 2 & & \multicolumn{2}{|c|}{ PDF } \\ \hline 3 Yield & Farm 1 & Farm 2 \\ \hline 4 & 0 & \\ \hline 5 & 10 & \\ \hline 26 & 20 & \\ \hline 27 & 30 & \\ \hline 28 & 40 & \\ \hline 29 & 50 & \\ \hline 30 & 60 & \\ \hline 31 & 70 & \\ \hline 32 & 80 & \\ \hline 33 & 90 & \\ \hline 34 & 100 & \\ \hline 35 & 110 & \\ \hline 36 & 120 & \\ \hline 37 & 130 & \\ \hline 38 & 140 & \\ \hline 39 & 150 & \\ \hline 40 & 160 & \\ \hline 41 & 170 & \\ \hline 42 & 180 & \\ \hline 43 & 190 & \\ \hline 44 & 200 & \\ \hline 45 & 210 & \\ \hline 46 & 220 & \\ \hline 47 & 230 & \\ \hline 48 & 240 & \\ \hline 49 & 250 & \\ \hline 50 & 260 & \\ \hline 51 & 270 & \\ \hline 52 & 280 & \\ \hline 53 & 290 & \\ \hline 54 & 300 & \\ \hline \end{tabular}