Okay so I have to do hypothesis testing on the following data in R (have to use R) : Response variable: Number of bird nests (numerical) Explanatory variables: 1. Presence of Acid Mine Drainage in...

Okay so I have to do hypothesis testing on the following data in R (have to use R) :

Response variable: Number of bird nests (numerical)

Explanatory variables: 1. Presence of Acid Mine Drainage in stream (Factor w/ 2 levels)

2. bridge type (factor w/ 3 levels)

3. bridge form (factor w/ 5 levels)

4. Traffic (factor w/ 3 levels)

I want to build I think a GLMM in R? Below is the code I have worked through pretty much I attempted to build a model and then deal with the overdispersion in the data.