What Is the Approximate Total Uncertainty in the Velocity of an Electron

What is the approximate total uncertainty in the velocity of an electron (9.11 $\times$ 10^-31 kg) confined within a gold atom whose diameter is about 270 pm? The uncertainty in the position of the electron is ±5.0% of the atom's diameter.

A) ±1.4 $\times$ 10³ m/s
B) ±2.1 $\times$ 10⁵ m/s
C) ±3.7 $\times$ 10⁵ m/s
D) ±2.1 $\times$ 10⁶ m/s
E) ±4.3 $\times$ 10⁶ m/s