Jim$-$O$\text{'}$s fast focus restaurant is opening up a new branch. Based on demand forecast the following service personnel levels are anticipated. Each of the employees must have two consecutive days off in a week. What is the number of employees needed for Thursday$-$Friday pair if the minimum number of employees are hired?

Days of Week

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

Sunday

Staff needs

$5$

$4$

$3$

$4$

$6$

$6$

$5$

$$

A$.$

$12$

B$.$

$10$

C$.$

$7$

D$.$

$6$

E$.$

$8$