Just a few questions about the various words for borthers and sisters.
Am I correct in assuming that if you have multiple older brothers or sisters you just refer to them as a group using 兄 and 姉？
and the same for 妹 and 弟？
Or would you use 兄弟 in that sentence too?
Also am I correct in saying 兄弟 can be brothers and sisters or just brother and 姉妹 is only for multiple sisters?