?Which of the following is correct based on the following code var vector Source - now ol.source. Vector format: new ol.format.GeoJSON (). url: function(extent) ( return 'htp://localhost:8080/GROServer/richland/wa2 services 'version 1.1.0 + srequest=Get Feature + "stypename-richland:schoolst! + "output Format application/json! + srsname=EPSG:39575, EPSG:3657'; } strategy: ol.loadingstrategy.bbox var vector = new ol.layer. Vector source: Vector Source map.addlayer (vector): It adds wfs layer above map 1 object a It adds wfs layer above map object It adds wps layer above map object It adds wms layer above map object