John left his house in Irvine at 8:35 a. m. to drive to a meeting in Los Angeles, 45 miles away. He arrived at the meeting at 9:50 a. m.. At 5:30 p. m. he left the meeting and drove home. He arrived home at 7:18 p. m.ⓐ What was his average speed on the drive from Irvine to Los Angeles? ⓑ What was his average speed on the drive from Los Angeles to Irvine? ⓒ What was the total time he spent driving to and from this meeting