Calculte running time and explain please

void hw1(int[] arr) { int a = arr.length; for (int b = 0; b < a; b++) { int ind = b; for (int c = b; j < a; c++) { if (arr[c] < arr[ind]) ind = c; } int tmp = arr[b]; arr[b] = arr[ind]; arr[ind] = tmp; } }