You have performed an experiment and your aim is to obtain pure colonies. However, you observe some colony variations and you need to verify that this is not due to contamination, name and describe the staining method would you use to achieve this goal? (8) 2.2 What do you call organisms that resist decolourization? (1) 2.3 What staining method would you use to verify that the isolates are not the organisms you mentioned in 2.2? Describe the procedure as well. 4.1 The world is facing a Corona Virus (COVID-19) Pandemic and as a potential scientist and a microbiology student, you have been required to prepare the easiest and most affordable hand sanitizer that can be utilized by students in various microbiology laboratories. Each student in your class has been given 96% ethanol and you are required to prepare 70% ethanol hand sanitizer in a 2L spray bottle. 4.1.1 What are the material you will need for this experiment? (3) 4.1.2 Calculate the amount of ethanol needed to prepare the 70% ethanol hand sanitizer in a 2L spray bottle (3) 4.1.3 Describe clearly the method you will use in order to achieve the aim of the practical