Help me out fast please

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums, 28 play drums, 18 play the guitar. what is the probability that the applicant who gets the job plays drums or guitar?

Once george got to know adam, they found that they really liked each other. this is an example of what factor in friendship