I have 2 different kinds of trees that are dying, I don't know what are they called. I had these tree for about 3 years, about 6 months ago they started to look unhealthy, I was not sure what to do, I tried to water them more often, but that didn't help, I used fertilizer , and also nothing help, I exposed them to more sun light, still they kept getting worse. they both lost most of their leaves . I would really appreciate it if anyone can help me ID them, or give me any advise on how I might help them recover. Thanks.