A human has the choice to spend $23$ ?hours working or learning. If they spend an hour working, they earn $ $13.$ ?If they spend an hour learning, then they can expect to progress through $5$ ?course concepts. What is their opportunity cost if they change from working $2$ ?hours and learning $21$ ?hours, to working $11$ ?hours and learning $12$ ?hours?

Group of answer choices

they gain $ $53,$ ?and forgo learning $216$ ?course concepts

they gain $ $91,$ ?and learns another $151$ ?course concepts

they gain $ $117,$ ?and forgo learning $45$ ?course concepts

they forgo $ $29,$ ?and learns another $12$ ?course concepts