2 separate questions, answer separately do not merge answers .
https://www.businessballs.com/self-management/eriksons-theory-of-human-development/
https://www.medicalnewstoday.com/articles/323454#treatment
https://prezi.com/rg-tfrysr_bp/postformal-thought/
https://sls.psychiatry.uw.edu/wp-content/uploads/2020/03/Adult-Cognitive-dev-from-lifespan.2010.pdf
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7869960/
https://doi.org/10.1176/appi.psychotherapy.20190028
https://www.businessballs.com/self-management/eriksons-theory-of-human-development/
https://www.medicalnewstoday.com/articles/323454#treatment