Answer:
a) Converting a, b and c to coded variables
X1 is defined for parameter a
X2 is defined for parameter b
X3 is defined for parameter c


+ ε
b) Vector of steepest ascent can be written as the formula attached.
c) The parameter 'a' has most influence on the output 'y'
![X1 = 2[(a - (amin + amax)/2) / (amax - amin)]\\X2 = 2[(b - (bmin + bmax)/2) / (bmax - bmin)]\\X3 = 2[(c - (cmin + cmax)/2) / (cmax - cmin)]](https://img.qammunity.org/2021/formulas/mathematics/college/tfi90y8ljulf74g53thbfie47e1uuzbxwx.png)
Explanation:
Equation is (b)
Table is (c), use the equation to in (c) above to fill the table from A - AD