```
using Symbolics
@variables x
D = Differential(x)
Z = 2.1309 + 0.0515x - 0.0009(x^2)
ZZ = expand_derivatives(D(Z))
# Derivative is 0.0515 - 0.0018x
println("Derivative is ",ZZ)
# How to get the coefficient of x from equation ZZ
# Question 1, how do I get the coefficient of x^0 which is 0.0515
#coefficient_x0 = ???
# Question 2, how do I get the coefficient of x^1 which is -0.0018
#coefficient_x1 = ???
# question 3, How do I find the root of the derivative which is 28.611
# derivative_root = ???
```

How to extract the coefficients of x from ZZ dynamically?