If −1 is a root of the equation 3x² + px + 2 = 0, and 7x² + px + k = 0 has equal roots, then what is the value of k?
\( \frac{2}{3} \)
\( \frac{7}{4} \)
\( \frac{7}{2} \)
\( \frac{4}{3} \)
If 60% of A = 1.2 of B = \( \frac{2}{5} \) of C, then find A : B : C.