Three unknown trees with berries

Three unknown trees with berries

Please help me identify these trees with colorful berries attached. Each was found along a woodland trail in Wisconsin, zone 4a. 1) Maybe unripe elderberry? Large white berries with smaller green and lavender berries, each with stamen-like object at the end. All berries grow in clusters at the end of the branch. Semi-gloss reddish-green bark. (Now, I think I may have a match for the white-berry tree -- Cornus sericea, or Red Osier Dogwood. Fruit is described as 'bitter', 'unpalatable', and causes nausea.) 2) Small glossy round red berries; tree was very twiggy. More shrub-like than tree-like; partially supported by its neighbors. Woody bark. 3) These green berries were almost out of reach. The berries are a tad more bulbous at the end and are fixed to the branch with green stems, like small cherry stems. Also with woody bark. I love reading this community and I'm glad I have something to post! Thanks to anyone who helps me ID these!
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