I need to use Excel solver. I need to set the objective to the equation y $=3$ e $^0.25$ x but I do no know how to write the formula correctly in order to accept the formula

Using Solver

Enter the following data into your Excel file $($copy and paste$)$:

The population represents the number of active bacterium present in a

sample at a given time $($hours$).$ When the bacteria population in the sample

reaches $4000,$ there is a need for action. At what time will you need to

take action? The process and company are most profitable when the

maximum $($less than $4000)$ number of bacteria are present.

For this example you need to use Solver which is a part of What$-$if analysis.