Acct. ID Description Predecessor Optimistic $($a$)$ Most Likely $($m$)$ Pessimistic $($b$)$ Activity Time $($te$)$ Variance

$[($b $-$ a$)/6]2$ Critical $?$

$1$ Design package None $61224139$ x

$2$ Design product $117192820\mathrm{.}173\mathrm{.}36$ x

$3$ Build package $1471071$

$4$ Secure patent $2242736284$

$5$ Build product $21729473025$ x

$6$ Paint $3,4,547127\mathrm{.}331\mathrm{.}78$ x

$7$ Test market $613171916\mathrm{.}671$ x