[ -1/2 ] 
-7/2 |-> -5/2 |-> -4 |-> -1/2
7/2 |-> 9/2 |-> -1/2
f(z) = -1/6*z^3 + 73/24*z + 1
*
[ 1/3 ] 
3 |-> -3 |-> 5 |-> 1/3
-19/3 |-> -16/3 |-> 1/3
-5 | 0.11965785169704528862072534874779796775 | 0.021816277457129518691681979414065851432
16/3 | 0.11965785169704528862072534874779796775 | 0.021816277457129518691681979414065851432
-1/3 | 0.11965785169704528862072534874779796775 | 0.021816277457129518691681979414065851432
f(z) = 3/40*z^3 - 241/120*z + 1
*
TOTAL: 2