Suppose $[V]=L^6,[]=N{L}^{-6},$ and $[t]=T.$

$($a$)$ What is the dimension of ${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}dV?$

Use an asterisk, ${?}^{**},$ to indicate multiplication. For example, $2^{**}f(x),a^{**}{x}^{**}(x+b)**(c^{**}x+d),b^{**}tan(a^{**})$ or

$[{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}dV]=$

$($b$)$ What is the dimension of $\frac{dV}{dt}?$

Use an asterisk $****$ tn indicate multinlication For examnle $2**f(x)a**x**(x+h)**(r**x+d)h**tan(a**)ar$