Arun notices that he is the 4th boy from the left and the 12th boy from the right in a single line. In order to have a total of 28 boys in the line, how many more boys need to be added?

In a class of 58 students, Tanvi secured the 26th rank from the top. Anaya's rank is one position lower (worse) than Tanvi's rank. Find the number of students who secured a lower rank than Anaya.

Mr. Kell ranked 155th from the bottom and 37th from the top in his class. How many students are there in his class?