Some theories of aging suggest that free radicals cause certain diseases and perhaps aging in general. as you know from lewis theory, such molecules are not chemically stable and will quickly react with other molecules. free radicals may attack molecules within the cell, such as dna, changing them and causing cancer or other diseases. free radicals may also attack molecules on the surfaces of cells, making them appear foreign to the body's immune system. the immune system then attacks the cells and destroys them, weakening the body. draw lewis structures for each of the following free radicals implicated in this theory of aging. a. o–b. o2–c. ohd. ch3oo (unpaired electron on terminaloxygen)

It’s b. mass i searched it up

For cyclohexane compounds drawn in a chair conformation:   -axial bonds are vertical  -equatorial bonds are parallel to two bonds within the ring.  thus, as i assume the chair conformation is drawn:   -the x group is in an axial position, as are the five other vertical bonds.  -three axial bonds are on the top face of the ring  -the other three axial bonds are on the bottom face  the position of the second substituent on each ring carbon is equatorial.  gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other.  drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1.  click this link and watch some academic videos that may you more understand the topic 

Yeah, but what are you trying to ask?