Looks like: Dieffenbachia sp., Dumb Cane Nephrolepis exaltata ? Schefflera arboricola, Umbrella Tree ?
The third is a palm but I don't know which one. There are several small palms available as potted plants. #5 looks like Sansevieria spp. While all of these have a chance of recovering, this is the only one that looks like it only needs some nurturing. It can tolerate lots of neglect, poor light, periods of drought. At first glance, I was thinking orchid? Lily? and so on. But given that all the plants are in pretty sad shape, I knew it had to be something much hardier. Tons of species of Sansevieria, some are low to the ground, others in tall spiky leaves, some with bands of color, some with white or yellow edges.
