2. concept&            2.1&         1.53&71&109\\
    &        2.2&         1.28&50&63\\
     &       2.3&         1.67& 54&90\\
      &      2.4&         0.86&13&11\\
&            2.5&         0.15&13&2\\
 &           2.6&         0.36&13&5\\\cline{4-5}
3. requirements&            3.1&         1.46&90&131\\
&            3.2&         3.89&54&210\\
 &           3.3&         1.6&53&85\\
  &          3.4&         1.62&50&81\\
   &         3.5&         0.77&5&4\\
    &        3.6&         0.00&0&0\\\cline{4-5}
         4.  design& 4.1&         2.71&81&220\\
   &         4.2&         4.31&31&134\\
    &        4.3&         2.50&9&23\\
     &       4.4&         2.84&88&250\\
      &      4.5&         1.43&5&7\\
       &     4.6&         0.63&35&22\\
        &    4.7&         0.00&0&0\\\cline{4-5}
5. implement&            5.1&         3.49&81&283\\
&            5.2&        0&53&0\\
 &           5.3&         10.28&53&545\\
  &          5.4&         5.06&26&132\\
   &         5.5&         1.16&26&30\\
&            5.6&         2.34&0&0\\
 &           5.7&         0&5&0\\
  &          5.8&         1.33&0&0\\
   &         5.9&         0&5&0\\
        &    5.10&         3.8&81&313\\
   &        5.11&         1.82&3&5\\\cline{4-5}
6. test&            6.1&         2.30&88&202\\
      &      6.2&         3.09&0&0\\
       &     6.3&        20.93&3&63\\
        &    6.4&         2.08&26&54\\
         &   6.5&         3.20&26&83\\\cline{4-5}