Process Synchronization: On a computer the time is maintained in shared memory

$($variable clock$)$ and updated by two programs: the tick$()$ program that wakes up every

second and updates the clock and the ntpUpdate$($int updateTicks$)$ routine that shifts the

time when it has drifted too much from the time on an NTP $($Network Time Protocol$)$

server. Many programs in the system need to read the clock value, concurrently with the

updates to it$.$ Write safe functions for tick$(),$ ntpUpdate$(),$ and readTime$()($only solutions that ensure maximum concurrency are

valid ones. Can you write the code in C$?$