Filter the values based on conditions on other two columns

Hi All,

I need help in below scenario

I need to consider the values based on few conditions 
1) if count(ProblemId)>1 && Priority = "Critical"(if we have 1 value with critical status, 2 values with "High" status i need to consider "Critical" one)

2) if count(Problemid)>1(if we have 2 values with "High" status i need to consider one value randomly)

3)  if Count(Problemid)=1 (regardless of Priority status we need to consider this)Image may be NSFW.
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