(a)The structural formulae of 1-Bromoheptane is: C₇H₁₅Br (as hept is denoting presence of 7 carbon atoms, 1-bromo is showing that at 1^st carbon, there is a bromine atom attached, and “ane” shows all are singly bonded.)

(b)The structural formulae of 5-Bromoheptanoic acid is: C₇H₁₃O₂Br ( as hept is denoting presence of 7 carbon atoms, 5-bromo is showing that at 5^th carbon, there is a bromine atom attached, and “ane” shows all are singly bonded and “oic acid” is indicating –COOH group.)