I am working on STATA 14 and have a panel data- long view with cross sectional data of Indian non-financial companies and time variable as year (2010-2020).
I have dependent variable as ROA and ROE and independent variables as proportion of female board directors(pfem), proportion of independent female board directors(pifem), dummy variable Female director (dumf) and dummy variable independent female directors(d_ifem).

How to find correlation between independent variables- pfem, pifem, dumf, and d_ifem?