(8) Consider the following synchronization problem: thread UNH adds 7 to a shared variable SCORE; then thread UM and thread BU must both read the value of SCORE (but they are allowed to read SCORE in any order); then after UM and BU read SCORE, thread UNH adds 3 to SCORE and then both BU and UM read the value of SCORE in any order. The entire process repeats. Give the code for these three threads, using semaphores, to guarantee the above sequence of events. (8) Consider the following synchronization problem: thread UNH adds 7 to a shared variable SCORE; then thread UM and thread BU must both read the value of SCORE (but they are allowed to read SCORE in any order); then after UM and BU read SCORE, thread UNH adds 3 to SCORE and then both BU and UM read the value of SCORE in any order. The entire process repeats. Give the code for these three threads, using semaphores, to guarantee the above sequence of events