Algebra 2?

Well,

as : S5 = 5 * (a1 + a5)/2 = 10 ==> (a1 + a5)/2 = 2
where :
(a1 + a5)/2 is the average value
it suffices to take any four values :
2 of them smaller than 2 and
2 of them greater than 2 and
at equal distance :

examples are :

1.4 - 1.7 - 2 - 2.3 - 2.6

1.2 - 1.6 - 2 - 2.4 - 2.8
etc.
if fact, take any value : e > 0
then :
2 - 2e - 2-e - 2 - 2+e - 2+2e is suitable !

hope it' ll help !!

S5 = 10
5(a1 + a5)/2 = 10
a1 + a5 = 4
-2, 0, 2, 4, ...
an = 2(n - 2)

0 1 2 3 4