A car driver is moving towards a fired rocket with a velocity of \( 8 \hat{\mathbf{i}} \mathrm{m...

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A car driver is moving towards a fired rocket with a velocity of \( 8 \hat{\mathbf{i}} \mathrm{ms}^{-1} \). He observed the rocket to be moving with a speed of \( 10 \mathrm{~ms}^{-1} \). A stationary observer will see the rocket to be moving with a speed of
(a) \( 5 \mathrm{~ms}^{-1} \)
(b) \( 6 \mathrm{~ms}^{-1} \)
(c) \( 7 \mathrm{~ms}^{-1} \)
(d) \( 8 \mathrm{~ms}^{-1} \)
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