\(n_{Br_2} = 4.0,1 = 0,4 = 2n_X = 2.\dfrac{4,48}{22,4}\\ \Rightarrow X: C_nH_{2n-2}\\ C_nH_{2n-2} +2Br_2 \to C_nH_{2n-2}Br_4\\ \%Br = \dfrac{80.4}{14n-2+80.4}.100\% = 85,562\%\\ \Rightarrow n = 4\\ CTCT\ X: \)
\(CH≡C-CH_2-CH_3\\ CH_3-C≡C-CH_3\\\)
CTCT Y :