(a) Mehak is curious, practical, skilled, alert and enthusiastic.
(b) Data given is insufficient to decide what kind of motion she infers.Motion can be uniform or non-uniform.
(c) Average speed = \(\frac{total\,distance\,travelled}{total\,time\,taken}\)
And total distance travelled is given by the area under the velocity v/s time graph
Hence,
Average speed = \(\frac{area\,under\,the\,curve}{total\,time\,taken}\)