$gcc hello.c -o hello $du -h hello 8.0K hello $gcc -pg hello.c -o hello $du -h hello 8.0K hello $ls -l hello -rwxr-xr-x 1 7417 Nov 2 05:46 hello $rm hello $gcc hello.c -o hello $ls -l hello -rwxr-xr-x 1 6593 Nov 2 05:47 hello $ some content supressed. The gcc compiler accepts both single-letter …