Trigger Google Analytics Event with Form Submission

Hi, I’m trying to trigger GA events from an embedded hubspot form as well, but it’s not working after following the instructions. Here is my form code - what have I done incorrectly?

<!--[if lte IE 8]>

<script charset=“utf-8” type=“text/javascript” src=“//js.hsforms.net/forms/v2-legacy.js”></script>

<![endif]-->

<script charset=“utf-8” type=“text/javascript” src=“//js.hsforms.net/forms/v2.js”></script>

<script>

hbspt.forms.create({

portalId: “4326424”,

formId: “106e45cd-6e1d-43b2-af21-78798a4b3e68”,

onFormSubmit: function($form){

ga (‘send’, ‘event’, ‘form-submit’, ‘contact-submit’, ‘contact-us-page’)

},

});

</script>