Plz help will give brainliest

Can someone me with this problem . show your work .

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42

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