Answer:
0
Step-by-step explanation:
2 friends to start plus 1 new friend is now 3 friends
if you now have 3 friends but then lose 3 you now have 0 friends
Zero, None
2 friends to start with
Gain 1 makes that 3
Lose 3, thats all of them
95.2
a1= 0.23
r=0.01
:)
zero residual equals zero mean
