How do I get checkbox checked or unchecked state using EPPlus ExcelPackage in c#

Question

There are 2 checkboxes, check box 6 - YES and check box 7 - NO. How do I get their checked or unchecked state using EPPlus package.. I have tried this, but in vain..

var package = new ExcelPackage(@”C:\file.xlsm”);
var worksheets = package.Workbook.Worksheets;
ExcelWorksheet sheet1 = worksheets.Where(m => m.Name.ToUpper().Contains("sheet1")).SingleOrDefault();

if (sheet1 != null)
{
    var pia = sheet.Cells["C4"].Text.Trim();
    ExcelDrawing checkbox6 = cableWorkOrder.Drawings.SingleOrDefault(a => a.Name == "Check Box 6");
   
    // How to read if check box 6 is checked or not..what is the correct way of doing this? 
}