$(10$ pts$)$ You are doing a water quality survey of the creek with special attention paid to dissolved oxygen. Glven the data below,

Shafizadeh Bridge

A $q,$

Hornet Creek

a$.$ Calculate the minimum DO$.$

b$.$ Determine whether the minimum occurs upstream or downstream of the bridge.

$\backslash$table$[[$Data at Point $A,$Data for Hornet Creek$],[$Flow$,100\frac{m}{3},$Velocity,$3\mathrm{.}5k\frac{m}{d}$