Can someone help me with these questions? They are practice problems for NMR lab

Question

Can someone help me with these questions? They are practice problems for NMR lab techniques for organic chemistry. I have some of the answers down but im nit sure if they're right. I had an earlier post with my answers in it and asked to have an expert check my answers to make sure they are right but they left a comment that the clarity if the pictures arent good so i had to take screenshots of the pdf file with no answers. But if u provide me with the answers for the questions then i can check the ones i did and then also add the questions i couldnt do. ..ooo T-Mobile 9:36 AM MiraCosta Community College District 5 of 15 S. In the above spectrum, why are there only two signals present when there are a total of 12 protons? 6. Why does the far left methyl group have such a higher chemical shift (3.20 ppm) than the remaining far right methyl groups (1.20 ppm)? ppm 7. Match the following non-equivalent protons with the signals in the above spectrum for: OH H3C H3C

Explanation / Answer

5-because there are only two different type of proton ,that is proton enviorment.

6- due to peresence of O-atom

7-c-medium peak, a-highest peak , b-lowest peak,

8-4

9-

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