How to fix this 'Object doesn't support property or method 'SPServices'?

Hi All,

I am trying to execute this script:

<script type="text/javascript" src="_catalogs/masterpage/js/jquery-1.8.2.min.js"></script><script type="text/javascript" src="_catalogs/masterpage/js/jquery.min.js"></script><script type="text/javascript" src="_catalogs/masterpage/js/jquery.SPServices-0.7.2.min.js"></script><script type="text/javascript" src="_catalogs/masterpage/js/jquery.SPServices-0.7.2.js"></script><script src="/_catalogs/masterpage/js/jquery-1.10.2.js"></script><script language="javascript" type="text/javascript">
$(document).ready(function() {alert("inside");
  $().SPServices({
    operation: "GetListItems",
    async: false,
    listName: "Announcement",
    CAMLViewFields: "<ViewFields><FieldRef Name='Title' /></ViewFields>",
    completefunc: function (xData, Status) {
      $(xData.responseXML).SPFilterNode("z:row").each(function() {
        var liHtml = "<li>" + $(this).attr("ows_Title") + "</li>";
        $("#tasksUL").append(liHtml);
      });
    }
  });

});
</script><ul id="tasksUL"/></script>