Sumowanie kolumn w macierzy 5x5

#include <stdio.h>

int main() {
    int a[5] = {0, 0, 0, 0, 0};
    int b[5] = {0, 0, 0, 0, 0};
    int c[5] = {0, 0, 0, 0, 0};
    int d[5] = {0, 0, 0, 0, 0};
    int e[5] = {0, 0, 0, 0, 0};
    int i, a6 = 0, b6 = 0, c6 = 0, d6 = 0, e6 = 0, k1 = 0, k2 = 0, k3 = 0,
           k4 = 0, k5 = 0;
    printf("\nPodaj 1. wiersz: ");
    for (i = 1; i <= 5; i++) {
        scanf("%d", &a[5]);
    }
    printf("\nPodaj 2. wiersz: ");
    for (i = 1; i <= 5; i++) {
        scanf("%d", &b[5]);
    }
    printf("\nPodaj 3. wiersz: ");
    for (i = 1; i <= 5; i++) {
        scanf("%d", &c[5]);
    }
    printf("\nPodaj 4. wiersz: ");
    for (i = 1; i <= 5; i++) {
        scanf("%d", &d[5]);
    }
    printf("\nPodaj 5. wiersz: ");
    for (i = 1; i <= 5; i++) {
        scanf("%d", &e[5]);
    }
    a6 = a[1] + a[2] + a[3] + a[4] + a[5];
    b6 = b[1] + b[2] + b[3] + b[4] + b[5];
    c6 = c[1] + c[2] + c[3] + c[4] + c[5];
    d6 = d[1] + d[2] + d[3] + d[4] + d[5];
    e6 = e[1] + e[2] + e[3] + e[4] + e[5];
    k1 = a[1] + b[1] + c[1] + d[1] + e[1];
    k2 = a[2] + b[2] + c[2] + d[2] + e[2];
    k3 = a[3] + b[3] + c[3] + d[3] + e[3];
    k4 = a[4] + b[4] + c[4] + d[4] + e[4];
    k5 = a[5] + b[5] + c[5] + d[5] + e[5];
    printf("Sumy w wierszach: %d %d %d %d %d", a6, b6, c6, d6, e6);
    printf("Sumy w kolumnach: %d %d %d %d %d", k1, k2, k3, k4, k5);
    return 0;
}

<source>: In function 'main':
<source>:31:39: error: array subscript 5 is above array bounds of 'int[5]' [-Werror=array-bounds=]
   31 |     a6 = a[1] + a[2] + a[3] + a[4] + a[5];
      |                                      ~^~~
<source>:4:9: note: while referencing 'a'
    4 |     int a[5] = {0, 0, 0, 0, 0};
      |         ^
<source>:32:39: error: array subscript 5 is above array bounds of 'int[5]' [-Werror=array-bounds=]
   32 |     b6 = b[1] + b[2] + b[3] + b[4] + b[5];
      |                                      ~^~~
<source>:5:9: note: while referencing 'b'
    5 |     int b[5] = {0, 0, 0, 0, 0};
      |         ^

    for (i = 1; i <= 5; i++) {
        scanf("%d", &a[5]);
    }

    a6 = a[1] + a[2] + a[3] + a[4] + a[5];

    a6 = a[0] + a[1] + a[2] + a[3] + a[4];

    for (i = 0; i <= 4; i++) {
        scanf("%d", &a[i]);
    }