In a row of people, Peter is 12th from the left end and John is 16th from the right end. If there are exactly 4 people between them, what is the total number of people in the row, assuming they do not overlap?

In a row of people all facing north, Piyush is 11th from the right end. Krishna is 20th from the right end. Krishna is exactly between Piyush and Jackie. If Jackie is 4th from the left end of the line, how many people are there in the row?

All 48 people are standing in a row facing north. Sanjay is 30th from the right end while Sanjana is 25th from the left end. How many people are there between Sanjay and Sanjana?