1.2. The fruits are not right for persimmon. Believe they are Amelanchier sp. Possibly Amelanchier alnifolia. http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Amelanchier+alnifolia
3.4. The fruit in pairs and the glands on the base of the leaf would lead me to cherries, Prunus sp. Prunus virginiana, chokecherry does not look right ,see http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Prunus+virginiana
Agree with Amelanchier for #1, and Prunus for #2. The Prunus may be naturalised Wild Cherry Prunus avium (from Europe), or possibly Pin Cherry Prunus pensylvanica (North American native, but only from northern KY northward).
Amelanchier alnifolia is a western species with rounded leaves. This is another serviceberry. The cherry has rather ragged leaf edges which could be a distinctive characteristic.
Yes, edible. There's a fair chance the cherry may be somewhat bitter, but it won't be poisonous. If bitter, it'll make a very good cherry pie.
