magnetic force Questions

An infinitely long straight conductor carries a current of $5\text{A}$. An electron is moving with a speed of $10^5\text{m/s}$ parallel to the conductor. The perpendicular distance between the electron and the conductor is $20\text{cm}$ at an instant. Calculate the magnitude of the force experienced by the electron at the instant.

In the product $\vec{F}=q(\vec{v}\times \vec{B})=q\vec{v}\times (B_0\hat{i}+B_0\hat{j}+B_z\hat{k})$.For $q=1$ and $\vec{v}=2\hat{i}+4\hat{j}+6\hat{k}$ and $\vec{F}=4\hat{i}-20\hat{j}+12\hat{k}$, what will be the complete expression for $\vec{B}$?