The figure gives the x-t plot of a particle executing a one-dimensional simple harmonic motion. Then the signs of position & velocity variables of the particle at t = -1.2 sec respectively are:

$\left(1\right) \mathrm{positive}, \mathrm{negative}$
$\left(2\right) \mathrm{positive}, \mathrm{positive}$
$\left(3\right) \mathrm{negative}, \mathrm{positive}$
$\left(4\right) \mathrm{negative}, \mathrm{negative}$

The position-time \((x-t)\) graphs for two children \(A\) and \(B\) returning from their school O to their homes P and Q respectively are shown in the graph. Choose the incorrect statement.

The instantaneous speed is always: