Assume in each of the following cases that the initial set of process user IDs is real=1000 effective=0 saved=0 file-system=0. What would be the state of the user IDs after the following calls?
a) setuid(2000);
b) setreuid(-1, 2000);
c) seteuid(2000);
d) setfsuid(2000);
e) setresuid(-1, 2000, 3000);