Question: In Lab Three, we have implemented ls -1 | wc -1 by using dup() and pipe(). Based on that, write a program use two pipes

In Lab Three, we have implemented ls -1 | wc -1

In Lab Three, we have implemented ls -1 | wc -1 by using dup() and pipe(). Based on that, write a program use two pipes to implement ls -1 | grep D | wc -l. In Lab Three, we have implemented ls -1 | wc -1 by using dup() and pipe(). Based on that, write a program use two pipes to implement ls -1 | grep D | wc -l

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