An arithmetic series is a number of integers in ascending or descending order where the difference between any two adjacent terms is a constant, for example 2, 6, 10, 14, 18, 22, 26, 30 is an anthmetic series in ascending order of which 2 is the first term, 22 is the 6th term and the constant difference is 4 The following incomplete program uses recursion to calculate the nth term of an ascending arithmetic series starting at 1, with a constant difference of 3,1e the series will be 1, 4, 7, 10, 13, 16, 19, etc Answer the questions below and provide code for the lines indicated Do not copy the complete program in your answer book Only write down the line number and the answer Answer the questions below and provide code for the lines indicated Do not copy the complete program in your answer book Only write down the line number and the answer 1 #include 2. 3 using namespace std, 4 int arith( int term ) 5 L 6 int first = 1, int diff = 3, 7. 8 if (term == 1) 9 return (1), 10 else 11. 12} 13 int main() 14 { 15 int term, answer, 16 cout > term, 18 answer = arith(term), "