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Answer the following based on the previous page. Note. A$)$ through $f)$ is asking for the general advantages and disadvantages of these three types of controls. Use the previous page for guidance. Note. DO NOT just say "environmentally friendly". Instead, discuss how it is environmentally friendly.

a$)$ Describe at least $2$ advantages of using Mechanical controls.

$1$

$2$

b$)$ Describe at least $2$ disadvantages of using Mechanical controls.

$1$

$2$

c$)$ Describe at least $2$ advantages of using Chemical controls.

$1$

$2$

d$)$ Describe at least $2$ disadvantages of using Chemical controls.