3. The following alcohol undergoes elimination in the presence of concentrated sulfuric acid to produce 6-carbon alkene. The C NMR of this product shows a large peak at 20.4 ppm and a smaller one at 123.4 ppm. (a) Draw the structure of the product, (b) assign the peaks to the structure (which one shows up at 20.4 ppm and which one shows up at 123.4 ppm), and (c) propose a mechanism for its formation (using curved arrow notation)