Question on Standard Erro of Mean, Null Hypotheses vs Research Hypothesis and process the entire process

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 I am looking for you to teach me what you learned this week relating everything to :  

1) The Standard Error of the Mean and why it is important! (3 points)

2) The difference between the Null Hypothesis & The Research Hypothesis (3 points)

3) How we make decisions regarding the null hypothesis/research hypothesis highlighting the entire process. Please finish your discussion by explaining to me the difference between Type 1 Error and Type II Error (4 points).