Help: A Level assessment

[Eric Opara]

Hi, struggling to do my assessment, in desperate need of any help.  here is
the the problem:-   To design and be able to carry out an experiment to
determine the effect of the concentration of a disinfectant on the growth of
bacteria.  Where bacteria grow in a glucose medium.

PLEASE!!! If any one can respond to this and shed any light on the topic
then i will be sincerely grateful.   THANKS!!!!