Problem $1$

Solve Problem $2$ from HW $2$ using Python and ODEINT from SciPy

Compare the solution from ODEINT with the Analytical solution from the homework

Ocean water that has a salinity of $35ppt$ flows at a rate of $5\frac{L}{m}in$ into a $100L$ tank with an agitator that contains $1\mathrm{.}5kg$ salt. The

salt solution flows out of the tank at a rate of $5\frac{L}{m}in.**$ppt $=$ parts per thousand $($mass basis$)$

Note: The analytical solution will require the use of the exponential function. This is available in NumPy. Search google for instructions on how

to use the exponential function using NumPy.

$[1]$ # Put your Code here

import numpy as $np,$ # Needed for defining arrays and for some of the mathematical functions

from scipy.integrate import odeint # Import odeint to solve system of ODEs

import matplotlib. pyplot as plt