State what model/approach you believe is the most relevant to the point of the analysis comparing the two COPD groups. Include why you believe that approach is best providing evidence for you choice. : the models were: Y = 1 + 2 + , Y = a + bX + e, Y = B0 + B1*X1 + B2*X2 + e,and lastly Y = 0 + 1*X1 + 2*X2 + 3*X1*X2 +