using c ,, please comment every line

Write a code to initialize PA4-0 as inputs and PA6 as output in function PortAlnit below. Use friendly code only. (half credit will be given to unfriendly code) #define GPIOPORTADATAR #define GPIOPORTADIRR #define GPIOPORTA. AFSELR #define GPIO-PORTA, DENR #define GPIOPORTA. AMSELR #define GPIOPORTAPCTLR #define SYSCTLRCGC2R "((volatile unsigned long )0x400043FC) ("((volatile unsigned long *)0x40004400)) ("((volatile unsigned long *)0x40004420)) (*(volatile unsigned long 0x4000451C) (((volatile unsigned long *)0x40004528)) (*((volatile unsigned long ")0x4000452C) ((volatile unsigned long )0x400FE108)) - - - - - - - - - - - void PortA Init(void)t