Complete the proof by filling-in the appropriate statements and reasons that are missing. Given: ∠1 and ∠2 are complementary angles.
Prove: ∠3 and ∠4 are complementary angles.

Plz asap what is the range of the cluster in the scatter plot a. between 4 and 8 years of experience b. between $40,000 and $60,000 c. between 6 and 12 years of experience d. between $10,000 and $60,000