Which of the following statements is true?

1. Character.isLowerCase( ) and Character.toLowerCase( ) are same.
2. Character.isLetter( ) and Character.isAlphabet( ) are same.
3. parse and valueOf functions are same.
4. Character.isDigit( ) and Character.isNumber( ) are same.

The variable must be declared …….. type, if a character is to be assigned to it.

1. char
2. ch
3. character
4. alphanumeric