Error while installing gr-inspector

[alphapats]

I am trying to install gr-inspector (maint gnuradio 3.7 branch). I am getting following error during cmake ../ :- ` -- Looking for Q_WS_X11 -- Looking for Q_WS_X11 - found -- Looking for Q_WS_WIN -- Looking for Q_WS_WIN - not found -- Looking for Q_WS_QWS -- Looking for Q_WS_QWS - not found -- Looking for Q_WS_MAC -- Looking for Q_WS_MAC - not found CMake Error at /usr/share/cmake-3.25/Modules/FindPackageHandleStandardArgs.cmake:230 (message): Could NOT find Qt4 (missing: QT_QWTPLOT3D_LIBRARY) (found suitable version "4.8.7", minimum required is "4.2.0") Call Stack (most recent call first): /usr/share/cmake-3.25/Modules/FindPackageHandleStandardArgs.cmake:600 (_FPHSA_FAILURE_MESSAGE) /usr/share/cmake-3.25/Modules/FindQt4.cmake:1328 (FIND_PACKAGE_HANDLE_STANDARD_ARGS) CMakeLists.txt:152 (find_package)

-- Configuring incomplete, errors occurred! See also "/home/user/Documents/gr-inspector/build/CMakeFiles/CMakeOutput.log". See also "/home/user/Documents/gr-inspector/build/CMakeFiles/CMakeError.log". ` I am using ubuntu 18 and GNU Radio Companion 3.7.13.4.