About how long does it take a traditional UNIX system to fork off a child process under the following conditions: text size = 100 KB, data size = 20 KB, stack size = 10 KB, task structure = 1 KB, user structure = 5 KB. The kernel trap and return takes 1 msec, and the machine can copy one 32-bit word every 50 nsec. Text segments are shared, but data and stack segments are not.