8. Let $a _ { 1 } , a _ { 2 } , a _ { 3 }$ form an arithmetic sequence, and $b _ { 1 } , b _ { 2 } , b _ { 3 }$ form a geometric sequence, where all six numbers are real. Which of the following statements are correct? (1) It is possible for both $a _ { 1 } < a _ { 2 }$ and $a _ { 2 } > a _ { 3 }$ to hold simultaneously (2) It is possible for both $b _ { 1 } < b _ { 2 }$ and $b _ { 2 } > b _ { 3 }$ to hold simultaneously (3) If $a _ { 1 } + a _ { 2 } < 0$, then $a _ { 2 } + a _ { 3 } < 0$ (4) If $b _ { 1 } b _ { 2 } < 0$, then $b _ { 2 } b _ { 3 } < 0$ (5) If $b _ { 1 } , b _ { 2 } , b _ { 3 }$ are all positive integers and $b _ { 1 } < b _ { 2 }$, then $b _ { 1 }$ divides $b _ { 2 }$
& 24 & & 20 & 1 & \multirow{2}{*}{G} & 36 & －
8. Let $a _ { 1 } , a _ { 2 } , a _ { 3 }$ form an arithmetic sequence, and $b _ { 1 } , b _ { 2 } , b _ { 3 }$ form a geometric sequence, where all six numbers are real. Which of the following statements are correct?\\
(1) It is possible for both $a _ { 1 } < a _ { 2 }$ and $a _ { 2 } > a _ { 3 }$ to hold simultaneously\\
(2) It is possible for both $b _ { 1 } < b _ { 2 }$ and $b _ { 2 } > b _ { 3 }$ to hold simultaneously\\
(3) If $a _ { 1 } + a _ { 2 } < 0$, then $a _ { 2 } + a _ { 3 } < 0$\\
(4) If $b _ { 1 } b _ { 2 } < 0$, then $b _ { 2 } b _ { 3 } < 0$\\
(5) If $b _ { 1 } , b _ { 2 } , b _ { 3 }$ are all positive integers and $b _ { 1 } < b _ { 2 }$, then $b _ { 1 }$ divides $b _ { 2 }$