A group of Maternal and Child Health public health practitioners are interested in the relationship between bacterial vaginosis (BV) and a number of negative health outcomes. Suppose the research team gathers information on a group of participants, and constructs a multiple linear regression model looking at the relationship between BV and depression, controlling for maternal age. The following is a computerized output displaying the results of their analysisParameter Estimate Standard Error t Value Pr > |t|Intercept 0.2186206635 0.06635040 3.29 0.0010Maternal Age -.0046496845 0.00221338 -2.10 0.0360Depression 0.1912412415 0.03151884 6.07 <.0001A) What are the dependent and independent variables in this investigation?B) Based on the information above, was the research team justified in controlling for maternal age in this population? Why or why not?C) Write out the model in symbols. Round to 3 decimal places. For example: DV (identify the dependent variable)= a (identify a) + b1(identify b1) x1 (identify X1)……..D) Is there a significant association between BV and depression?