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Refering to the v-t curve, which of the ...

Refering to the `v-t` curve, which of the following are correct ?
(i) Acceleration is uniform in region 1
(ii) The particle moves along `+x-`direction with uniform velocity in region 2.
(iii) Acceleration increases with time in region 3 and while the particle speed up, acceleration decreases in region 4
(iv) The particle deccelerates in region 5.

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