Hi. Unfortunately the photos are not clear enough for me to positively ID. There is a glare that obscures the photo. It is also important to have clear photos of the foliage of each plant since there can be similarities in flowers. The yellow flower is likely in the helianthus or sunflower family. There are so many white daisy like flowers I am not sure about yours without foliage. The pink could be in the phlox family. The other missing piece of information is the time of year and where these plants were growing. Sorry I cannot help you further.