Chapter 6.5, Problem 1CP

What is the minimum uncertainty in the position of an election moving at a speed of $\text{ 4 }\times {\text{ 10}}^{\text{6}}\text{m/s ± 1 percent? }\left(\text{The mass of an electron is 9}\text{.11 }\times {\text{ 10}}^{\text{-31}}\text{kg}\text{.}\right)$

$\begin{array}{l}\text{a)}\hfill \\ \text{2 }\times {\text{ 10}}^{\text{-8}}\text{m}\hfill \\ \text{b)}\hfill \\ \text{1 }\times {\text{ 10}}^{\text{-9}}\text{m}\hfill \\ \text{c)}\hfill \\ \text{6 }\times {\text{ 10}}^{\text{-9}}\text{m}\hfill \\ \text{d)}\hfill \\ \text{7 }\times {\text{ 10}}^{\text{-8}}\text{ m}\hfill \\ \text{e)}\hfill \\ \text{1 }\times {\text{ 10}}^{\text{-12}}\text{m}\hfill \end{array}$