At 5 A.M., the temperature was 50 degrees + 1.5 degrees = <<50+1.5=51.5>>51.5 degrees.
At 7 A.M., the temperature was 51.5 degrees + 1.5 degrees = <<51.5+1.5=53>>53 degrees.
At 9 A.M., the temperature was 53 degrees + 1.5 degrees = <<53+1.5=54.5>>54.5 degrees.
At 11 A.M., the temperature was 54.5 degrees + 1.5 degrees = <<54.5+1.5=56>>56 degrees.
#### 56