我正在尝试在ubuntu 17.04上安装Postgres 10，但出现此错误
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
postgresql-10 : Depends: postgresql-client-10 but it is not going to be installed
Depends: libicu60 (>= 60.1-1~) but it is not installable
Depends: libpq5 (>= 9.3~) but it is not going to be installed
Depends: libssl1.1 (>= 1.1.0) but it is not installable
Recommends: sysstat but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
问题是我用Google搜索了它，但只发现了一些，我唯一的解决方案是升级我的ubuntu，这是我无权执行的。
有什么办法可以解决这个问题？