A proton moving in the plane of the page has a kinetic energy of 6.00 MeV. A magnetic field of magnitude $B=1.00$ $\mathrm{T}$ is directed into the page. The proton enters the magnetic field with its velocity vector at an angle $\theta=45.0^{\circ}$ to the linear boundary of the field as shown in the linear boundary of the field as shown in Figure P 29.76 . (a) Find $x,$ the distance from the point of entry to where the proton will leave the field. (b) Determine $\theta$ , the angle between the boundary and the proton's velocity vector as it leaves the field.