Define a function vdW$($V$,$ T$,$ n$)$ that takes $3$ parameters $($volume

$,$ temperature

and number of moles

$)$ and returns the pressure, as calculated by the van der Waals equation above.

Hints:

Your function must be named vdW $($and remember that Python is case sensitive$).$

You can use the constants a$,$ b and

$($that we defined earlier$)$ in your function body $$ no need to re$-$define them in your function. The get "implicitly" passed into the function, even through they are not part of the argument list.

The function arguments are understood to be in SI units $($for example,

is in m$^3).$ If you deviate from this practice, bad things can happen, such as NASA's loss of the Mars Climate Orbiter.