1. A restaurant asks customers to rate their experience on a scale from 1 to 5 stars, with 1 star being least satisfied, and 5 stars being most satisfied. The table below represents the probability that a customer will give the indicated satisfaction rating.

Satisfaction Rating,	1	2	3	4	5
Probability,()	?	0.05	0.12	0.19	0.45

Find the "?" value that would make this table a valid discrete probability distribution. If this is not possible, explain why.