how to create the sensitive analysis model in excel?

my assignment question is "Conduct a relative valuation of the firms also. valuations need to include a sensitivity analysis"

i want to have a step by step tutorial for me.....

i have already calculated the all the value from DCF, but i dont know how to use it link it to my sensitive analysis model.

i want to see how the different scenario e.g. change in growth rate. would impact on my enterprise value.... something like that.

or how to use the ebitda mutilpler or any relative ratio to create the analysis .

Thank you