If you can learn those during the summer, then I'd say you're so gifted that you can work where you'd like.
If the intent is just to attain a basic understanding that enables one to complete projects and pass muster as an intern/junior developer, then it's likely possible with enough effort.
If the intent is to do a "deep dive" on each topic, or even attaining mastery during the course of a summer, then that's another matter entirely.
On that note, the concept of mastery is similarly subjective. Even the lowest definition of mastery for a single one of those topics lie far beyond the timescale of a single summer, at least for most people, and especially if they lack previous experience. Fortunately, very few people are masters of anything.
For me personally, that's the understanding. Enough to get a job as an intern or junior dev.