Okay, this is not really an answer, but I think in 2020, we will be in the 20 trillions. O know that is not the answer you were looking for, but its all I got.
The missing blank is 2 because 7+2=9.
Answer:
attached below
Step-by-step explanation:
Attached below is a detailed solution to your problem above
a) show that the maximum likelihood estimator of Ï2 is Xi and Yi.
attached below is the detailed solution