<p>I knew one brother of a HS classmate who took 7 years to graduate from a state school because he switched from being a math major to Electrical Engineering in his third year and was working part-time. Hopefully, that was the last switch as adding another 4 years due to extensive unfulfilled prereqs and working part-time was causing him plenty of problems with his parents…especially when his sister ended up graduating in 4 years from another state institution on full scholarship.</p>