For the following experiment, identify the following components of the experimental design (some may be absent in the experiment):

1. Factor(s)

4. Factor Levels

7. Treatments

10. Response

2. Experimental Units

5. Measurement Units

8. Replications

11. Subsampling

3. Covariates

6. Blocking

9. Confounding

An experiment was run to assess the compressive strength of the cover on golf balls. The experimental plan includes random sampling of balls from four brands (B1, B2, B3, B4) of golf balls. Furthermore, each brand of golf ball has three thickness of covers (T1, T2, T3) and two types of cover materials (M1, M2). The compressive strength of the golf ball was recorded at five randomly selected spots on each golf ball in the study. A total of six golf balls were evaluated for each combination of Brand, Thickness and Material Type. There are two major testing facilities so half of the balls are tested at one facility and the remaining balls at the second facility. The testing is done inside at a controlled temperature.