The fibonacci sequence is the series of numbers 0, 1, 1, 2, 3, 5, 8, …. it is defined by the following mathematical expression, with x0 and x1 being 0 and 1, respectively: xn = xn-1 + xn-2 write a c program using the fork() system call that generates and prints the fibonacci sequence in the child process. the number of members in the sequence will be determined by a user provided as a user prompted input. make the parent process wait for the child process to complete before exiting. make the program print both the parent and child process ids. the program should perform the necessary error checking to only accept positive integers from the user. a failure of fork() should be caught and printed as an error message using err_sys call.

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?