main jQuery library isn't loading

Hi folks –

I don’t know all that much about coding but I’m doing my best to learn – I’m getting a couple of javascript errors that I’d really appreciate some help with clearing:

This is what I’m getting when I use firebug:

ReferenceError: jQuery is not defined

jQuery(function(){
https://www.navina.ca (line 34, col 6)

ReferenceError: jQuery is not defined

jQuery(function($) {
https://www.navina.ca (line 90, col 2)

SyntaxError: syntax error

nt,’script’,’//www.google-analytics.com/analytics.js’,’ga’);</p>
https://www.navina.ca (line 424, col 78)

I was told by someone else that my main jQuery library isn’t loading – can someone please step me through how to fix this?

Thanks in advance.