$\Rightarrow F \propto \frac{ q }{ m }$

thus $F _{1}: F _{2}: F _{3}=\frac{ q _{1}}{ m _{1}}: \frac{ q _{2}}{ m _{2}}: \frac{ q _{3}}{ m _{3}}$

$=\frac{ e }{ m _{ p }}: \frac{ e }{2 m _{ p }}: \frac{2 e }{4 m _{ p }}$

$=\frac{1}{1}: \frac{1}{2}: \frac{2}{4}$

$=2: 1: 1$

Now for speed calculation

$P = constant \Rightarrow v \propto \frac{1}{ m }$

thus $v _{1}: v _{2}: v _{3}=\frac{1}{ m _{ p }}: \frac{1}{2 m _{ p }}: \frac{1}{4 m _{ p }}$

$=\frac{1}{1}: \frac{1}{2}: \frac{1}{4}$

$=4: 2: 1$