1) the superclass calculator contains:
a) a (protected) double instance variable, accumulator, that contains the current value of the calculator.
b) write a subclass
2) calculator with memory, that contains:
a) a double instance variable, memory, initialized to 0
b) a method, save, that assigns the value of accumulator to memory
c) a method, recall, that assigns the value of memory to accumulator
d) a method, clearmemory, that assigns zero to memory
e) a method, getmemory, that returns the value stored in memory

Which of the following commands is more recommended while creating a bot?

Problem 1 - hashing we would like to use initials to locate an individual. for instance, mel should locate the person mark e. lehr. note: this is all upper case. generate a hash function for the above using the numbers on your telephone. you know, each letter has a number associated with it, so examine your telephone keypad. generate 512 random 3 letter initials and take statistics on a linked list array size 512 to hold this information report how many have no elements, 1 element, 2 elements, does this agree with the hashing statistics distribution?

Write a method that takes in an array of point2d objects, and then analyzes the dataset to find points that are close together. be sure to review the point2d api. in your method, if the distance between any pair of points is less than 10, display the distance and the (x,y)s of each point. for example, "the distance between (3,5) and (8,9) is 6.40312." the complete api for the point2d adt may be viewed at ~pf/sedgewick-wayne/algs4/documentation/point2d.html (links to an external site.)links to an external site.. try to write your program directly from the api - do not review the adt's source code.