Which of the following alkynes will produce a single product upon mercury(II)-catalyzed hydration? ○ 1) 2-methyl-5-ethyl-3-heptyne 2) 3,3-dimethyl-1-heptyne 3) 3-hexyne 4) 2-hexyne 5) Both 3,3-dimethyl-1-heptyne and 3-hexyne