Problem: You have designed a study to examine the association between depression and hypertension (high blood pressure). You recruit 520 participants who complete a depression screening tool which classifies them as either depressed (E ) or not depressed (E-) and have their blood pressure measured (at the same time) to determine whether they meet the criteria for hypertension (i.e. blood pressure >=140/90) (D ) or do not have hypertension (D-). Use the dataset "hypertension520" to conduct analyses to answer questions 1-6 below. Variable Description Code participant Unique study identification (ID) number for each study participant Numeric variable depression Based on score on validated depression scale 0 = not depressed 1 = depressed hypertension Hypertension based on blood pressure reading 0 = no hypertension 1 = hypertension 1. Based on the description above what type of study design is this and how did you know?