The following argument is true by the law of detachment. If today is sunny, then I will go running. Today I did not go running. Therefore, it is not sunny today. true or false

I'm having some trouble on this, can you help me pls. how can you tell if this is right or wrong

You are a male who just graduated from college with a bachelor's degree. you have a job paying $50,780.00/yr. a. how does your salary compare to the yearly median earnings for a male with a bachelor's degree? b. what is the difference between the yearly median earnings for a male with a bachelor's degree compared to a male who does not attend college after earning a high school diploma?