Answer questions $7-8$ based on the following diagram.

Q: You are given a line balancing problem for a product with the following diagram, what are the immediate predecessors of task $5?$

Q$7$ pic$-1.$png

Group of answer choices

$2,3,4$

$3,4,5$

$3$

$2$

Flag question: Question $8$

Question $82$ pts

If the demand for this product is $10,$ and the maximum production time is $70$ hrs$.$ What is the theoretical minimum number of workstations, and what is the line efficiency by using the ranked positional weight heuristic? $($Assume the time given in the diagram has units of hours$)$

Group of answer choices

$4,0\mathrm{.}833$

$3,0\mathrm{.}953$

$3,0\mathrm{.}714$

$4,0\mathrm{.}714$