Write structural formulas for each of the following:

(a) Three ethers with the formula C₄H₁₀O.
(b) Three primary alcohols with the formula C₄H₈O.
(c) A secondary alcohol with the formula C₃H₆O.
(d) A tertiary alcohol with the formula C₄H₈O.
(e) Two esters with the formula C₃H₆O₂.
(f) Four primary alkyl halides with the formula C₅H₁₁Br.
(g) Three secondary alkyl halides with the formula C₅H₁₁Br.

(h) A tertiary alkyl halide with the formula C₅H₁₁Br.
(i) Three aldehydes with the formula C₅H₁₀O.
(j) Three ketones with the formula C₅H₁₀O.
(k) Two primary amines with the formula C₃H₉N.
(l) A secondary amine with the formula C₃H₉N.
(m) A tertiary amine with the formula C₃H₉N.
(n) Two amides with the formula C₂H₅N_O.