I am trying to build out the ES/EF/LS/LF/Slack table for this chart. This is what I have, and I am confused on the LF and LS columns. Can someone check my work and tell me what I am doing wrong? I am calculating LS as LF-Duration, and EF as ES+Duration, and Slack as LF-EF. The only values I am filling in are ES and LF. The rest are calculated.

Activity	Duration	ES	EF	LS	LF	Slack
A	7	0	7	-3	4	-3
B	3	7	10	4	7	-3
C	3	7	10	7	10	0
D	5	7	12	7	12	0
E	6	12	18	12	18	0
F	4	18	22	18	22	0
G	2	22	24	22	24	0
H	4	10	14	10	14	0
I	4	14	18	14	18	0
J	10	18	28	18	28	0
K	2	10	12	10	12	0
L	3	12	15	12	15	0
M	8	15	23	15	23	0
N	6	10	16	10	16	0
O	7	24	31	24	31	0
P	20	10	30	10	30	0
Q	4	10	14	16	20	6
R	4	14	18	20	24	6
S	3	25	28	25	28	0
T	4	7	11	7	11	0
U	6	11	17	11	17	0
V	7	11	18	11	18	0
W	4	18	22	18	22	0
X	8	17	25	17	25	0
Y	6	10	16	10	16	0
Z	6	16	22	16	22	0

I've also included my chart that I drew based on the table.

After figuring out the table, I should be able to find the critical path.

Thank you

PREDECESSOR(S) TIME (WEEKS) 7 B A 3 n A 3 5 D B E D 6 F E 4 G F 2 H I 4 J 1 10 K 2 L DK 3 ACTIVITY DESCRIPTION A Finalize site and building contracts Select local promoter Hire production manager Design promotional Web site Set TV deal Hire director Plan for TV camera placement Target headline entertainers 1 Target support entertainers Travel accommodations for talent Set venue capacity Ticketmaster contract On-site ticketing Sound and staging Passes and stage credentials Travel accommodations for staff Q Hire sponsor coordinator Finalize sponsors Define/place signage for sponsors Hire operations Manager Develop site plan Hire security director Set police/fire security plan Power, plumbing, AC, toilet services Secure merchandise deals Z Online merchandise sales M L 8 N 6 o GR 7 B 20 Q B 4 R 4 S R, X 3 T A 4 U T 6 V T 7 w V 4 U 8 Y B 6 Y 6 Start A V U N w Q P X S R L M