8x square + 1 + 3square - 2​

Does anyone know how to do geometryme with this problem

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours

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