Question $1($Mandatory$)(10$ points$)$

Given no other information, which checkout line should one choose to join for a likely higher probability of a quicker checkout? Line A or Line B$?$ Assume each customer represents a substantive set$-$up time $($setting up counter for new customer, greeting customer, answering questions, new payment mode cash$/$check$/$money etc..$)$ at the cashiers, apart from the task time $($scanning$).$

Line A $-5$ customers ahead of you Line B $-2$ customers ahead of you Cashier $-30$ yrs old, experienced Cashier $-30$ yrs old, experienced

Cust $-20$ items in cart Cust $-70$ items in cart

Cust $-22$ items in cart Cust $-60$ items in cart

Cust $-20$ items in cart

Cust $-10$ items in cart

Cust $-20$ items in cart

Question $1$ options:

Indifferent to either Line A or Line B

e$=$ mc$2$

Line B

Line A