Table 1: Bernard Holdings Pty Ltd. Activities

Activity	a	m	b	Predecessor
A	17	29	47	None
B	6	12	24	A
C	16	19	28	A
D	13	16	19	B
E	2	5	14	C
F	2	5	8	D,E

1. 
   
2. Draw a network diagram for this project and determine: ES, LS, EF, LF, critical path and project duration.                                                                                       
3. Determine the probability for this project to be completed before 67 units of time, beyond 60th unit time, and between 60th and 67th unit times.