Task	Task Time (seconds)	Tasks that must Precede
A	30	--
B	16	A
C	19	A
D	20	--
E	20	B,C
F	18	D
G	12	E
H	45	F,G

The above tasks must be performed on an assembly line in the sequence and times specified. The workstation cycle time is 51 seconds. Using the longest task time to balance the assembly line, the first workstation includes ___________, the second workstation includes ____________, the third workstation includes ______________, and the fourth workstation includes___________________ . (For each blank write tasks in alphabetical order without space or comma. For example, if workstation 1 includes task A, task C and task E, write them as ACE, not A,C,E, A C E or CAE.)