My husband and I planted a bag of mixed wild meadow flowers a few years back and every year now we have had different flowers popping up!
I was hoping that someone could help me identify some of them. Apologies in advance for the poor quality of photos as they were taken with a cell phone in the evening.

Here is the first one:
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The flowers are purple and pink. These ones came up everywhere around our garden this year! They are long and slender and somewhat resemble Snapdragons. The bees love them!

The second one:
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I'm not sure if this is the same one as the first flower posted, just in a different color. The shape is the same, long and slender with yellow flowers.

The third one:
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This one I originally thought was Cowslip, but now I have my doubts. The flowers are also yellow. Note: There are pumpkin/squash plants in the background.

The fourth and last one:
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Is this Yarrow? I'm checking to be sure, because I'd love to harvest some for medicinal purposes.

As a side note, I'm in Europe zone 6/6b if that helps any! Thanks to anyone who reads and offers suggestions! :)