Aboy and a girl are balanced on a seesaw. the boy has mass of 50 kilograms and the girl has mass of 31 kilograms. if the boy sits 2.1 meters from the pivot point (fulcrum) on one side of the seesaw, how far from the pivot point on the other side must the girl sit in order to keep the seesaw balanced?

Consider a file currently consisting of 200 blocks. assume that the file control block (and the index block in the case of indexed allocation) is already in memory. calculate how many disk i/o operations are required for contiguous, linked, and indexed (single-level) allocation strategies, for each of the conditions listed below. in the contiguous-allocation case, assume that there is not room to grow at the beginning but there is room to grow at the end. also assume that the block information to be added is stored in memory.