techniques used in assessment and remediation of bacteriophage sensitivity of commercial dairy starter strain

Hi
m title project is assessment and remediation of bacteriophage sensitivity of a commercial dairy starter strain. what i would like you to do is cover this area
1. bacteriophage-insensitive mutants
2. Exploit naturally occurring resistance systems
3. Genetically engineer resistance
Explain how this strategies used to generate phage resistant starter strain. and if you can write briefly about cell culture method method in the beginning

In the answer, it should be clear,what the research question is, what

the technique(s)is (are), and how it (they) might be applied. You should provide
references (e.g.to the method or how it has been applied for similar
questions)