operating system 2 Q

1. Explain the difference between how fork() and vfork() UNIX system calls calls work, from Virtual memory management prospective. i.e., explain how the way these system calls work affects how the memory management system deals with them. (relevant to Section  9.1-3)
2. Assume the following page reference sequence. (1, 2, 3, 5, 6, 2, 3, 4, 5, 6, 1, 2, 1, 6, 7). Calculate the number of page faults as well as the content of the memory frames at the end of the references for the following 6 cases (scenarios): the memory system contains 1, 2, 3, 4, 5, or 6 frames. Draw curve that show Number of Frames on the X axis and number of page faults on the Y axis. Show your work in a separate page of paper? (relevant to Section  9.4)                                                                                                            

Please i need the solutions the whole i want you show the work as it says in the questions. and i need the aswers from the book as it says in the book and same definition. the work i want it looks like student's work, looks like the student did it. if need the book i got copy if want email the pages sure.