https://www.chegg.com/homework-help/questions-and-answers/1-analyze-following-circuit-series-goals-described-84--48--ve-7-6-r2-62--2-source-okt-si-u-q44551974

https://www.chegg.com/homework-help/questions-and-answers/1-analyze-following-circuit-series-goals-described-use-mesh-analysis-find-value-vs-results-q44641907