Considering a disk with a number of tracks and each track has multiple sectors, we have a notation of a disk visit as (a, b), where a is the disk track number and b is the sector number on track a. For the following sequence of requests: (1, 23), (2, 57), (1,1), (1, 89), (2, 13), (2,78), (1,5), (2,75), (3, 45), (3,98), (2,72), (3,47), (2,76), (3,97). If you know this set of requests in advance, how would you reorder the sequence to minimize the total disk access time?

Simon says is a memory game where "simon" outputs a sequence of 10 characters (r, g, b, y) and the user must repeat the sequence. create a for loop that compares the two strings. for each match, add one point to user_score. upon a mismatch, end the game. sample output with inputs: 'rrgbryybgy' 'rrgbbrybgy'

Two students are discussing the flow of electricity. student a says that voltage is a measure of the amount of electron flow in a circuit. student b says that power is the product of voltage and current. which of the following statements is correct? a. only student a is correct b. only student b is correct c. both of the two students are correct d. neither of the two students is correct

Write a program that will askthe user to enter the amount of a purchase. the program should thencompute the state and county sales tax. assume the state sales tax is4 percent and the county sales tax is 2 percent. the program should displaythe amount of the purchase, the state tax, the county sales tax, the total salestax, and the total of the sale. (which is the sum of theamount of purchase plus the total sales tax). hint: use the value 0.02 torepresent 2 percent, and 0.04 to represent 4 percent.