Please help I need 1, 2, 5, and 6!

With this one. will mark brainliest

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons