here is a question with its solution, I just need an explanation to it's solving method. I would appreciated if anyone could show me how its solved.

CS 271 Computer Architecture and Assembly Language Self-Check for Lecture #14 SOLUTION Here is a partial "listing file" for a MASM program PROC call intro call getData main 00000005 0000000A more implementation code for main exit exit to operating system ENDP 0000001B 0000001B 0000003E C3 main intr PROC Implementation code for intro ret return to calling procedure ENDP 0000003F intro 0000003F getData PROC more implementation code for getData 00000058 call validate 0000005D :... more implementation code for getData 00000067 ?? ret return to calling procedure 00000068 00000068 0000008A C3 getData ENDP PROC ret return to calling procedure validate Implementation code for validate 0000008B validate ENDP Show the contents of the specified registers before and after the execution of each statement (OK to use 4-digit hex). The first row is completed for you. Show the contents of the system stack after each instruction. Fill in the System Stack "Memory Address" column. When a "Memory Contents" value is replaced, lightly cross out the previous value (instead of erasing it). The shaded parts are completed for you. System Stack Address/ Instruction ESP MemorY Contents EIP EIP ESP MemorY 0000 call intro 003E ret 0005 call getData 0058 call validate 008A ret 0067 ret before after before after 03FC 0400 03FC 03F8 03FC 0400 003E 0005 0058 008A 0067 001B 0005 003F 0068 0400 03FC 0400 03FC 03F8 03FC 03EC 03F0 03F4 03F8 005D 0005 000A 000A 0400 CS 271 Computer Architecture and Assembly Language Self-Check for Lecture #14 SOLUTION Here is a partial "listing file" for a MASM program PROC call intro call getData main 00000005 0000000A more implementation code for main exit exit to operating system ENDP 0000001B 0000001B 0000003E C3 main intr PROC Implementation code for intro ret return to calling procedure ENDP 0000003F intro 0000003F getData PROC more implementation code for getData 00000058 call validate 0000005D :... more implementation code for getData 00000067 ?? ret return to calling procedure 00000068 00000068 0000008A C3 getData ENDP PROC ret return to calling procedure validate Implementation code for validate 0000008B validate ENDP Show the contents of the specified registers before and after the execution of each statement (OK to use 4-digit hex). The first row is completed for you. Show the contents of the system stack after each instruction. Fill in the System Stack "Memory Address" column. When a "Memory Contents" value is replaced, lightly cross out the previous value (instead of erasing it). The shaded parts are completed for you. System Stack Address/ Instruction ESP MemorY Contents EIP EIP ESP MemorY 0000 call intro 003E ret 0005 call getData 0058 call validate 008A ret 0067 ret before after before after 03FC 0400 03FC 03F8 03FC 0400 003E 0005 0058 008A 0067 001B 0005 003F 0068 0400 03FC 0400 03FC 03F8 03FC 03EC 03F0 03F4 03F8 005D 0005 000A 000A 0400