Suppose that a program performs an intermixed sequence of (stack) push and pop operations. The push operations put the integers 0 through 9 in order onto the stack; the pop operations print out the return values. Which of the following sequence(s) could not occur?

a. 4321098765
b. 2143658790
c. 0465381729
d. 4687532901

Write an assembly program with the following specifications. a). in the main block, you should have two registers r4 and r5. they should be checked in an infinite loop. if r4 is greater than r5, then the greater subroutine will be called. if r4 is less than r5, then the less subroutine will be called. if r4 equals r5, then no operations will be done

This graph compares the cost of room and board at educational institutions in texas.

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.