Please either text or computer generate your response as some hand written answers are a bit hard to read! and provide brief example in simple terms

3. Using Newman projections, draw each of the following molecules in its most stable conformation with respect to the bond indicated: a) 2,2-dimethylpentane, C3-C4 bond; b) 2-bromo-3-methylbutane, C2-C3 bond; c) 2-methylbutane, C2-C3 bond; d) 2,2-dimethylbutane, C2-C3 bond