Linux Given a directory called $$diry$$ and a file called $$filex$,$ please answer the following questions.

a$.$ Write a test command to test if $$diry$$ is a directory

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b$.$ Write a test command to test if $$filex$$ is a file.

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c$.$ Write a test command to test if filex is $$executible$.$ If so$,$ include a logical AND $($ &&$)$ clause that echo $$Yes $-$ filex is a executable$$