Unit 2: audiogram_presby.jpg is displayed twice (2.30 and 2.34)

[jamesthcheung]

https://mutor-2.github.io/MUTOR/assets/images/audiogram_presby.jpg

I suspect that the wrong images are embedded for figures 2.30-2.31, judging from the alleged image source. The source points to our image [https://mutor-2.github.io/MUTOR/assets/images/audiogram_compared.gif], which is not included in the page (and therefore not redrawn).

I think the correct images would be: 2.30: audiogram_compared.gif 2.31: audiogram.jpg 2:34: audiogram_presby.jpg

[maccallum]

yes, you're right, go ahead and make the change @cheungtszhim

[jamesthcheung]

Done