Who wrote “Summer Song”, etc.?

I thought this was very tricky and well done. His original songs have to be just good enough that you could imagine his close friends believing in him enough for him to pursue this career, but not good enough that we have trouble believing he is unsuccessful. In fact, his biggest song, the so-called “crowdpleaser”, has to be weak enough that he gets called out when he tries to slip it in with all the Beatles songs (also a great little touch as you know he would be tempted).