1. For each of the following structure declarations, determine the offset of each field, the total size of the structure, and its alignment requirement for x86-64. See Practice problem 3.44 of page 275 for reference. It's best if you write C code to answer the question. struct P1 f char a; int b; char c; int d; struct P2 ( long a; char b; int c; char d; > struct P3 char a[21 short bI5] struct P4 f char *a[4; short b[3i hi struct P5 struct P2 a; struct P3 b3]: i offset total size alignment requirement P1 P4 P5