java simple statments

11. To input your mobile number from the keyboard using Scanner class object reference variable, s. 12. To input your name from the keyboard using Scanner class object reference variable, s. 13. To print the character "@" from the string abc@nct.edu.om 14. To print the expression: a42a2+b2b4 using methods from Math class. 15. To declare a static method Item () which returns name of the items, with default access. 16. To import a Scanner class. 17. To import a System class. 18. To change if-else statement by ternary operator/conditional operator If(10>5) "Java"; else "c++