An electron moving along the $x-$axis with a velocity of vec$(v)=2\mathrm{.}50{10}^6$hat$(i)\frac{m}{s}$ enters a region of a magnetic field: vec$(B)=(2\mathrm{.}26$hat$(i)+2\mathrm{.}26$hat$(j))mT.$ What is the force exerted on the electron?

$-9\mathrm{.}04{10}^{-16}$hat$(j)N$

$-9\mathrm{.}04{10}^{-16}$hat$(k)N$

$-1\mathrm{.}81{10}^{-16}$hat$(k)N$

$9\mathrm{.}04{10}^{-16}$hat$(k)N$

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