Based on the network given in Figure $1,$ and related information given in Table $1,$ answer the questions $($a$)$ thru $($g$).$

Figure $1.$ Network Diagram of the Schedule

Table $1.$ Additional Information for Activities in Figure $1.$

$\backslash$table$[[\backslash$table$[[$Activity$],[$ID$]],\backslash$table$[[$Optimistic$],[$Duration$,],[t_o$