. It is known that a bank's customer relations department receives 3 customers per hour and the service can serve 8 customers per hour. As there is flexible working due to the pandemic, a single employee provides service for customer relations. The Pn probabilities of n customers in the system are:

n	0	1	2	3	4	5	6	7	>=8
Pn	0,625	0,234	0,088	0,033	0,012	0,005	0,002	0,001	0

In this case, calculate the performance measures of this queuing system (WS, WQ, LS, LQ)