Express the following in the form of $\;a+bi : (-5i) \; (\large\frac{1}{8}i)$

Question

$(a)\;\large\frac{1}{8} + 0 i\qquad(b)\;\large\frac{3}{8} + 2 i \qquad(c)\;\large\frac{5}{8} + 0 i \qquad(d)\;\large\frac{5}{3} + 3 i$