Three polynomials are factored below, but some coefficients and constants are missing. All of the missing values of a, b, c, and d are integers.

1. $\displaystyle{{x}}^{{2}}-{8}{x}+{15}={\left({a}{x}+{b}\right)}{\left({c}{x}+{d}\right)}\usepackage{cmbright}\Huge\$

2. $\displaystyle{2}{{x}}^{{3}}-{8}{{x}}^{{2}}-{24}{x}={2}{x}{\left({a}{x}+{b}\right)}{\left({c}{x}+{d}\right)}\usepackage{cmbright}\Huge\$

3. $\displaystyle{6}{{x}}^{{2}}+{14}{x}+{4}={\left({a}{x}+{b}\right)}{\left({c}{x}+{d}\right)}\usepackage{cmbright}\Huge\$

Fill in the table with the missing values of a, b, c, and d.