Model Electric and Magnetic Fields Practice Test

A proton enters a region of uniform magnetic field $\vec B$ directed into the page ($\otimes$). Its initial velocity $\vec v$ is upward in the plane of the page. Neglecting gravity, what path will the proton follow while it remains in the field?

Two point charges lie on the $x$-axis: $Q_1=+4.0,\mu\text{C}$ at $x=-0.20,\text{m}$ and $Q_2=-4.0,\mu\text{C}$ at $x=+0.20,\text{m}$. At the origin ($x=0$), what is the direction of the net electric field $\vec E$ due to these charges?