i=1:s=0
Do Whilei<= 5
a(i)=Int(Rnd*8)+2
For j= 1 To i-1
s=s+ a(j)
Next j
If i>= 2 And a(i)> s Theni=i-1
s=0
i=i+ 1
Loop
执行该程序段后,在下列选项中,a(1)~a(5)各元素值不可能的是( )