Consider an RAID-5 storage with 5 disk drives. A block read takes 10 time units, a block write takes 5 time units, and computing an XOR result of two blocks takes 1 time unit. Assume only one XOR operation can be performed each time (i. e., XOR operations cannot be done in parallel). A stripe (a row) has four data blocks (A, B, C, and D) and a parity block P, which are stored in the five disks, one in each disk respectively. If we need to write one data block A, give two methods to update this stripe in the RAID-5 storage. Explain each method step by step, and calculate the corresponding time cost that is needed for each method to complete the operations.

Assume the existence of a bankaccount class. define a derived class, savingsaccount that contains two instance variables: the first a double, named interestrate, and the second an integer named interesttype. the value of the interesttype variable can be 1 for simple interest and 2 for compound interest. there is also a constructor that accepts two parameters: a double that is used to initialize the interestrate variable, and a string that you may assume will contain either "simple", or "compound", and which should be used to initialize the interesttype variable appropriately. there should also be a pair of functions getinterestrate and getinteresttype that return the values of the corresponding data members (as double and int respectively).

Write a program that prints the day number of the year, given the date in the form month-day-year. for example, if the input is 1-1-2006, the day number is 1; if the input is 12-25-2006, the day number is 359. the program should check for a leap year. a year is a leap year if it is divisible by 4, but not divisible by 100. for example, 1992 and 2008 are divisible by 4, but not by 100. a year that is divisible by 100 is a leap year if it is also divisible by 400. for example, 1600 and 2000 are divisible by 400. however, 1800 is not a leap year because 1800 is not divisible by 400.

What would be the address of the cell, which is at the intersection of the second row and the third column in a worksheet?