Question $1$

A project has $79$ activities but only $9$ activities are discussed here.

Activity $K,$ duration $=39$ days, $IP=$ not given

Activity $Q,$ duration $=27$ days, $IP=$ not given

Activity $D,$ duration $=16$ days, $IP=$ not given

Activity $L,$ duration $=36$ days, $IP=K$

Activity $P,$ duration $=55$ days, $IP=K,Q,D$

Activity $A,$ duration $=33$ days, $IP=D$

Activity $M,$ duration $=28$ days, $IP=L,P$

Activity $N,$ duration $=11$ days, $IP=L,P$

Activity $R,$ duration $=16$ days, $IP=P,A$

If $LF$ of $M=225,LF$ of $N=220,$ and $LF$ of $R=214,$ find $LS(D)$