The chemical environment of protons can be deduced from their chemical shifts. What are the relative chemical shifts of the protons at the labeled positions? [Protons that are highly shielded have low delta (chemical shift) values.]
1)
The proton with the lowest delta value (the most shielded) is \( \square \)
The proton with the highest delta value (the most deshielded) is \( \square \)