step by step please

Partial information about Project GX152 is given below. Activity G, 39 days, IP = not given Activity H, 59 days, IP not given Activity K, 39 days, IP = not given Activity M, 16 days, IP = G, H Activity N, 35 days, IP = G Activity P, 55 days, IP = H, K Activity Q, 11 days, IP = N, P Activity R, 36 days, IP = = P. You also know the following: LF of M = 144, LF of Q = 235, LF of R = 234. What is LS of H = ? Type a value only long