Uncaught TypeError: Cannot read property '1' of undefined in leaflet.js

I‘m running a code to plot the marker according to their coordination on leaflet after I getJSON from mysql database,

but the system continue getting error as ‘Uncaught TypeError: Cannot read property ‘1’ of undefined’.

The code is below:

<html>
 <head>
  <title>A Leaflet map</title>

 <link rel=“stylesheet” href=“https://unpkg.com/leaflet@1.3.1/dist/leaflet.css
integrity=“sha512Rksm5RenBEKSKFjgI3a41vrjkw4EVPlJ3+OiI65vTjIdo9brlAacEuKOiQ5OFh7cOI1bkDwLqdLw3Zg0cRJAAQ==“crossorigin=””/>

<script type=‘text/javascript’ src=‘http://code.jquery.com/jquery-1.10.2.min.js?ver=1.10.2’></script>
<script type=‘text/javascript’ src=“https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js”></script>
<script type=‘text/javascript’ src=“https://unpkg.com/leaflet@1.3.1/dist/leaflet.js
integrity=“sha512-/Nsx9X4HebavoBvEBuyp3I7od5tA0UzAxs+j83KgC8PU0kgB4XiK4Lfe4y4cgBtaRJQEIFCW+oC506aPT2L1zw==“crossorigin=””></script>

<div id=“map”></div>
<style>
#map{ height: 100% }
</style>
</head>

<body>

<script type=“text/javascript”>

var markerArray = [];
var map = L.map(‘map’).setView([40.730610, -73.935242], 11.5);
L.tileLayer(‘https://cartodb-basemaps-{s}.global.ssl.fastly.net/light_all/{z}/{x}/{y}.png’,
{
attribution: ‘© <a href=" ">OpenStreetMap</a > © <a        href=“http://cartodb.com/attributions”>CartoDB</a >’,
subdomains: ‘abcd’,
maxZoom: 19
}).addTo(map);

var url= “http://dev.spatialdatacapture.org:8827/airbnb”;
console.log(url);

$.getJSON( url, function(data){
$.each(data, function(k,v){
var lng = v.longitude;
var lat = v.latitude;

var marker = {
“type”:‘Feature’,
“properties”:
{
“id”:v.id,
“host_id”:v.host_id,
“host_listings_count”:v.host_listings_count,
“property_type”:v.property_type,
“room_type”:v.room_type,
“price”:v.price,
“review_scores_rating”:v.review_scores_rating,
“review_scores_accuracy”:v.review_scores_accuracy,
“review_scores_cleaness”:v.review_scores_cleaness,
“review_scores_checkin”:v.review_scores_checkin,
“review_scores_communication”:v.review_scores_communication,
“review_scores_location”:v.review_scores_location,
“review_scores_value”:v.review_scores_value,
“NTACode”:v.NTACode,
“NTAName”:v.NTAName,
},
“geometry”:{
“type”:‘Point’,
“coordination” : [lng,lat]
}
};

markerArray.push(marker);

});
var geoj = {“type”:“FeatureCollection”,“features”: markerArray};

console.log(geoj);

L.geoJson(geoj,{
PointToLayer: function(feature,latLng){
return L.circleMarker(latLng,geojsonMarkerOptions).on(‘mouseover’,function(){
this.bindPopup(“NTAName”+feature.properties.NTAName +"</div><div>"+“price”+feature.properties.price+"</div><div>"+"</div>").openPopup();
});
}
}).addTo(map);
//onEachFeature: function (feature, layer) {
//layer.bindPopup(feature.properties.coordination);
// }
});

The data looks fine as above, does the property “1” means the array[1] for coordination?