HELP ASAP!

To access data in a hard disk, it requires the time to move the head to the desired track (seek time). Once the head has reached the correct track, we must wait for the desired sector to rotate under the read/write head (rotational latency). The last component of a disk access is the time to transfer a block of bits (transfer time). What is the average read time in the given factors: 512B sector, 5400 RPM, 3 ms average seek time, 100 MB/s transfer rate, 0.2 ms controller overhead, idle disk? (hint: Average read time = seek time + rotational latency + transfer time + controller delay)