please help me calculate t(n) and big oh please show steps im very lost

1 // Count sorting n numbers in the range of a thru b 2 private void countsort(int a, int b}{// a and b are range soon ba nozdno 3 int freq[], i, j, k, cnt = 0 p, range = b -a +1; 915 279dmunni mueza dunia 4. // Allocate space for freq array sho fruto abrogibna 2) 5 freq = new int[range); 901 rit ridmundase to neuport als tumes // compute frequency of array elements noupa beruamos no bed 7 for (j = 0; j<>