Ariani, sorry to disagree, but #3, the white flowered umbel is not Capsella bursa pastoris. There are heart shaped seed pods in the crowded picture that look like that common plant, but the umbel and flower petals don't look right. Compare this here. It may be that the seed pods are C. bursa pastoris, but are commingled with so many other rampant plants, including this unusual petaled white umbel. I believe Lila nailed the ID.
