Get sector access time

sector.txt

basic: Access Time = Seek time + Rotational latency + Transfer time (https://superuser.com/a/841680/855619)
    Solution: tsector = Ts + L + T 
Ts = seek time; average time to position head over track 
r = rotation speed of the disk, in revolutions per second 
n = bits per sector (capacity of sector)
N = bits per track (capacity of track)
tsector = time to access a sector 

FOR L
Get Rotational latency in ms. Multiple by 60, then by 10,000
L =  (0.5 ÷ r ) * 60 *  10,000 (from class instruction)
Get Transfer rate. Multiply 
general formula from text book
FOR T
T = bytes to transfer ÷ (rotations per sec)(num of bytes per track)
   = total sector capacity ÷( RPS * (bits per track * 8))
byes to transfer must be total capacity of sector here n
we are give bits but need bytes, so must multiple by 8
T =  N ÷ (r)(n  * 8)