Find and solve the problems presented in the image.

The tasks involve calculating various angles in geometric configurations. Here are the detailed solutions: (1) For problem 7, given ∠BCD=120°, we find ∠DBE=60° (using properties of adjacent angles). (2) For problem 8, calculate ∠SOQ using given information. (3) Problem 9 asks for ∠TLN when ∠KLR=40°. Using complementary angle properties, ∠TLN=50°. (4) Problem 10 involves solving for ∠DOE. (5) Problem 11 calculates ∠MSP and ∠NSK. (6) Problem 12 involves ∠AMN and ∠BMN. See each solution for detailed step-by-step explanation.