Five rowed archegonial neck occurs in ____________.
28. Abhishek has worked more night shifts in a row than Satya Prakash, who has worked five. Deepak has worked fifteen night shifts in a row, which is more than Abhishek and Satya Prakash combined. Shamim has worked eight night shifts in a row, which is less than Abhishek. How many night shifts in a row has Abhishek worked?