Help unterminated string constant error?

I have been working with after effects and I was trying to make a wiggle effects, I watched a tutorial about how to do it, I followed everything correctly, but I got an error.. Can anyone help me out, I entered this as expression (it was in video description)

minAudio = 0;

maxAudio = 100;

minStretch = 90;

maxStretch = 120;

audioLev = thisComp.layer("Sound Keys").effect("Sound Keys")("Output 1”);

s = linear(audioLev, minAudio, maxAudio, minStretch, maxStretch);

[s,s]