Unknown apple tree issues

Presumed underwatering or deficiency of some kind

Unknown problem

hello, I've recently come back from vacation and I noticed some problems on my honeycrisp apple tree, the first is the discoloration and curling of leaves. I presume its because of not enough watering, but I'm still not sure. the second problem is the leaves that aren't affected by the discoloration are slowly getting taking over by brown blotches seen in the photo. I'm not sure what these problems are, but any help would be appreciated, thanks.