Given the OIS rate, Please explain How to get the 2 Year and 5 Year Zero Rate, Thank you!

Table 7.3 OIS Rates and the calculation of the OIS zero curve. \begin{tabular}{lccc} OISmaturity & OISrate & CompoundingfrequencyforOISrate & Zerorate(cont.comp.) \\ \hline 1 month & 1.8% & Monthly & 1.7987% \\ 3 months & 2.0% & Quarterly & 1.9950% \\ 6 months & 2.2% & Semiannually & 2.1880% \\ 12 months & 2.5% & Annually & 2.4693% \\ 2 years & 3.0% & Quarterly & 2.9994% \\ 5 years & 4.0% & Quarterly & 4.0401% \end{tabular}