In a row of people, Kamlesh is 9th from the left and Vipin is 16th from the right. If they interchange their positions, Kamlesh becomes 25th from the left. How many people are there in the row?

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?