$5-$ Find the acceleration vector field for a fluid flow that possesses the following velocity field

where $x,y,z$ are in meters. Evaluate the acceleration at $(2,-1,-3)$ at $t=2s.$

a$)V=20(1-y^2)i\frac{m}{s}$

b$)V=2+2y\frac{j}{s}$

c$)V=x^{2}ti+2xytj+2yztk\frac{m}{s}$

d$)V=-2xyzj+tzk\frac{m}{s}$