$4\mathrm{.}15$ Determine the $x$ and $y$ components of acceleration for the

flow $u=c(x^2-y^2)$ and $v=-2cxy,$ where $c$ is a constant. If $c>0,$

is the particle at point $x=x_0>0$ and $y=0$ accelerating or decel$-$

erating? Explain. Repeat if