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The \( x-t \) graph for motion of a car is given below.
With reference to the graph, which of the given option(s) is/are incorrect?
(a) The instantaneous speed during the interval \( t=5 \mathrm{~s} \) to \( t=10 \mathrm{~s} \) is negative at all time instants during the interval.
(b) The velocity and the average velocity for the interval \( t=0 \mathrm{~s} \) to \( t=5 \mathrm{~s} \) are equal and positive.
(c) The car changes its direction of motion at \( t=5 \mathrm{~s} \).
(d) The instantaneous speed and the instantaneous velocity are positive at all time instants during the interval \( t=0 \mathrm{~s} \) to \( t=5 \mathrm{~s} \).
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