The sales manager for a TV station affliate in a certain city recently surveyed 20 advertisers and asked each one to rate the service of the station on the scale of 1-Very Good, 2-Good, 3-Fair, 4-Poor, and 5-Very Poor. The manager also tracked the general time slot when the advertiser's commercials were shown on the station with the codes 1= moming, 2= afternoon, 3= evening, and 4= various times. The accompanying sample data were observed. Complete parts a through c below. Click the icon to view the survey data. Survey Data Points: 0 of advertisers and as The manager also 2 = afternoon, 3=e Survey Data Points: 0 of advertisers and as The manager also 2= afternoon, 3=e Survey Data Points: 0 of advertisers and a The manager alsc 2= arternoon, 3 Rating Frequency Rel. Frequency (Round to two decimal places as needed.)