An electron moving at $4\mathrm{.}00{10}^3\frac{m}{s}$ in a $1\mathrm{.}25-T$ magnetic field experiences a magnetic force of $1\mathrm{.}40{10}^{-16}N.$ What angle does the velocity of the electron make with the magnetic field?

$8\mathrm{.}90$

$12\mathrm{.}4$

$9\mathrm{.}10$

$10\mathrm{.}1$

$11\mathrm{.}7$