The $.$mat file "StreamData.mat" contains a table that has the water level in feet $(ft),$ channel width in feet $(ft),$ and velocity data in meters per second $(\frac{m}{s})$ for different streams. Load the file. Then calculate the flow rate of each stream in cubic meters per second $(m^{{?}^{{?}^{?}}}\frac{3}{s}).$ These flow rate values should be stored as a new column named FlowRate in the table. The data in the original columns should remain unchanged.

The flow rate can be calculated for a rectangular channel with the equation:

$Q=hbV$