Question $1$: Write a parallel program using Pthreads that is able to determine ifan array of integers is sorted.Question $2$: Write two parallel programs using Pthreads that each launch $7$ threads saying Hello from thread $1,$ Hello from thread $2,$ etc. with the restriction that $1.$ For the first program the threads must print their output in the following thread id order: $1,4,2,3,7,6,5$For the second program threads $1$ and $4$ can print their output in any order and onlythen threads $3,5,6,7$ print their output also in any order. So for instance $4,1|7,6,3,5$ and $1,4|3,5,7,6$ are both valid orderings for output. But $7,1,5,6,3,4$ is not.Question $3$: Write a parallel program using Pthreads that implements even$-$odd sort on a given array of integers.