Direction: The following table shows the five different projects named X, Y, Z, M and N and four persons working on it. The second table shows the part of respective project that could not be completed by individuals in time. 

The following table shows the number of days for which 4 individuals A, B, C and D worked on 5 different projects X, Y, Z, M and N. It also shows the part of respective project that could not be completed by individuals in time. 

Some values are missing which are denoted by symbol (-). With the help of information in questions and table below answer the questions that follow.