The IBM 370 mainframe computer was introduced in 1970. The 370 Model 145 could hold up to 512 KB of memory. It cost $1,783,000.00 to buy (or $37,330/month to rent). A notebook computer today holds 16GB of memory and costs $2,500 to buy. If you assume that 100% of the price is just the memory, for both computers:

a. How much did 1 Kbyte of memory in the IBM computer cost?
b. How much does 1 Kbyte of memory in the laptop cost?
c. How many times cheaper is the memory in the laptop than memory in the mainframe?
d. What factor is today’s computer cheaper than the IBM 370?

This question involves a class named textfile that represents a text file. public class textfile { private string filename; private string filename; private arraylist words; // constructors not shown // postcondition: returns the number of bytes in this file public int filesize() { } // precondition: 0 < = index < words.size() // postcondition: removes numwords words from the words arraylist beginning at // index. public void deletewords(int index, int numwords) { } // precondition: 0 < = index < = words.size() // postcondition: adds elements from newwords array to words arraylist beginning // at index. pub lic voidaddwords(int index, string[] newwords) { } // other methods not shown } complete the filesize() method. the filesize() is computed in bytes. in a text file, each character in each word counts as one byte. in addition, there is a space in between each word in the words arraylist, and each of those spaces also counts as one byte. for example, suppose the words arraylist stores the following words: { mary had a little lamb; its fleece was white as snow. } the filesize() method would compute 4 + 3 + 1 + 6 + 5 + 4 + 6 + 3 + 5 + 2 + 5 as the sum of the lengths of each string in the arraylist. the value returned would be this sum plus 10, because there would also be 10 spaces in between the 11 words. complete the filesize() method below: // postcondition: returns the number of bytes in this file public int filesize() { }