Consider a system using MVP allocation with 200 units of memory in which the OS takes up the first 50 units A linked list is used to track allocation, with each link containing the process name (or X if it is a hole), the starting memory unit, and the number of units allocated. Processes arrive and depart as follows (with process name and size in units for arrivals):

(A, 30), (B,20), (C,30), A departs, (D, 40), (E, 10), B departs.

If First Fit is used, the first hole on the list starts at ___________ and has size ___________