create an AON diagram for this ref Description Duration $($Months$)$ Immediate Predecessor

$1$ Stadium $--$

$2$ Clear site $3\mathrm{.}5-$

$3$ Demolish adjacent building $1\mathrm{.}52$

$4$ Set$-$up construction site $1\mathrm{.}53$

$5$ Drive support piles $62$

$6$ Pour lower concrete bowl $65$

$7$ Pour main concourse $63,6$

$8$ Install playing field $4\mathrm{.}53,6$

$9$ Construct upper steel bowl $63,6$

$10$ Install seats $67,9$

$11$ Build luxury boxes $4\mathrm{.}57,9$

$12$ Install scoreboard $1\mathrm{.}57,9$

$13$ Install stadium infrastructure $67,9$

$14$ Construct steel canopy $4\mathrm{.}510$

$15$ Install lights $1\mathrm{.}514$

$16$ Build roof track support $4\mathrm{.}56$

$17$ Construct roof $1016$

$18$ Install roof tracks $4\mathrm{.}516$

$19$ Install roof $4\mathrm{.}517,18$

$20$ Inspection $0\mathrm{.}58,11,13,15,19$

$21$ Closeout $04,12,20$