How to set font style of excel header and footer using Syncfusion XlsIO?

using (ExcelEngine excelEngine = new ExcelEngine())
{
    //Get the application.
    IApplication application = excelEngine.Excel;
    application.DefaultVersion = ExcelVersion.Xlsx;
 
    //Create the workbook.
    IWorkbook workbook = application.Workbooks.Create(1);
 
    //Get the first worksheet.
    IWorksheet worksheet = workbook.Worksheets[0];
 
    //Create some Wingdings circles in the left page header.
    worksheet.PageSetup.LeftHeader = @"Header: &""Wingdings,Regular""lllll";
 
    //Create some Wingdings circles the first row.
    worksheet["A1"].Text = "Cell:";
    worksheet["B1"].Text = "lllll";
    worksheet["B1"].CellStyle.Font.FontName = "Wingdings";
 
    //Set the remaining headers and footers as well.
    worksheet.PageSetup.CenterHeader = "&Z";
    worksheet.PageSetup.RightHeader = "&N";
    worksheet.PageSetup.LeftFooter = "&F";
    worksheet.PageSetup.CenterFooter = "&P";
    worksheet.PageSetup.RightFooter = "&A";
 
    //Save the Excel document.
    workbook.SaveAs("../../Output/Output.xlsx");
}
using (ExcelToPdfConverter converter = new ExcelToPdfConverter("../../Output/Output.xlsx"))
{
    ExcelToPdfConverterSettings settings = new ExcelToPdfConverterSettings()
    {
        EmbedFonts = true
    };
 
    PdfDocument pdf = converter.Convert(settings);
    pdf.Save("../../Output/ExcelToPDF.pdf");
}