$[$Question $1722]$ Kim is planning to invent a new recipe for his signature fried chicken store. Kim has determined the activities required to complete the project, the precedence relationships of the activities, and activity time estimates, as shown in the following table:

$\backslash$table$[[$Letter$,$Name,Predecessor,Best,Most,Worst$],[$A$,$Create a new recipe,.,$4,7,16],[$B$,$Buy chickens,.,$2,5,8],[$C$,$Buy sauces,A$,$ B$,7,7,7],[$D$,$Market Research,C$,6,9,12],[$E$,$Cost Analysis,C$,5,8,11],[$F$,$Fried Chicken Design,C$,3,6,9],[$G$,$Product Testing,D$,$ E$,7,10,13],[$H$,$Pricing,E$,$ F$,6,9,12],[$I$,$Sales Marketing,G$,4,10,16]]19.$ What is the z$-$score that Kim will give up his recipe development?

a$)0$ ~ $0\mathrm{.}5$

b$)0\mathrm{.}5$ ~ $1\mathrm{.}0$

c$)1\mathrm{.}0$ ~ $1\mathrm{.}5$

d$)1\mathrm{.}5$ ~ $2\mathrm{.}0$

e$)2\mathrm{.}0$ ~ $2\mathrm{.}5$

$20.$ Determine the probability that Kim will give up his recipe development.

a$)0$ ~ $20\%$

b$)20$ ~ $40\%$

c$)40$ ~ $60\%$

d$)60$ ~ $80\%$

e$)80$ ~ $100\%$