sudo apt-get install libqt5x11extras5 qtdeclarative5-controls-plugin qtdeclarative5-dialogs-plugin
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package libqt5x11extras5 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

Package qtdeclarative5-controls-plugin is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

Package qtdeclarative5-dialogs-plugin is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'libqt5x11extras5' has no installation candidate
E: Package 'qtdeclarative5-controls-plugin' has no installation candidate
E: Package 'qtdeclarative5-dialogs-plugin' has no installation candidate