Solitary Confinement and the 8th amendment

Watch the Frontline Documentary entitled, “The Last Days of Solitary” and answer the following questions:
What are some of the potential psychological consequences of solitary confinement?
In your opinion is the use of solitary confinement as depicted in the video cruel and usual punishment? Why or why not?
Should limits be placed on how long inmates can be held in solitary confinement? Why or why not? What should those limits be?
From a correctional administration standpoint, are there circumstances where solitary confinement might be considered an appropriate sanction for rule infractions? And if so, which ones?
https://www.pbs.org/wgbh/frontline/documentary/last-days-of-solitary/