What line number of the following code contains an error and what type of error is it? 1. double sales_tax(amt) { 2. double sale = amt + (amt * .06); 3. return amt; 4. } 5. 6. int main() { 7. cout << "Welcome to the 6% tax calculator!\n"; 8. double total; 9. cout << "Please enter the total amount: "; 10. cin >> total; 11. cout << "The total amount after tax is: " << sales_tax(total); 12. } a. line 11, logic error b. line 3, syntax error c. line 1, runtime error d. line 1, syntax error