Critical Analysis Path

[needhelpmaths]

The question is like this.

A- 10 days
B - 8
C - 1
D - 8
E - 3
F - 2
G - 3
H - 1
I - 1
J -1
K -2
L -2
A, B, G starts first.B follows by C. A,C follows by D, D follows by E,
E follows by F, D&G follows by H, H follows by I, E follows by J,

I&J follows by K, D follows by L.
Draw a network diagram.

In Network diagram, May i know is "Dummy" process can direct connect
to "Finish Point"?
And is it a must for an activity to connect to 'Finish Point'? can it
jus hang in there and do not connect to finish point? (Others
activities connect to the finish point, only one doesnt. Is it possible?




[Difficulty]
Im solving the question and the diagram i drew is TWO of the activity
(L and F) connect to "finsh point" through dummy process. im not sure
this can happen or not. but the weird thing is the activites were
given its duration time and im doubting my answer. as i know, dummy
process doesnt need to label time.

[Thoughts]
For my answer, i connect L and F to finish point through dummy
process. i ddint label the duration time for L and F