apt-get install libqt4-declarative ... libqt4-declarative is already the newest version. The following packeges were automatically installed and are no longer required: ... Use 'apt-get autoremove' to remove them. 0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
apt-get install libqtcore4 (or libqtgui4) ... Package libqtcore4 is not longer 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 soure E: Package libqtcore4 has no installation candidate