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7.(15 pts.) Consider the class.Counter below: public class Counter ( Counter () (val 0; void up() (val++;) void down() (val) int getVal() (return val;) public String tostring) ( return "A counter with value"+ val; protected int val; a)Define a class BoundedCounter that extends Counter. It has a member limit. No up operation can go beyond limit and no down operation can go below 0. Make sure it has a constructor and overrides the toString method. b) Can a BoundedCounter object be passed to a method that expects a Counter object? c) Can a Counter object be passed to a method that expects a BoundedCounter object