An n-way join performs consecutive n-1 joins among n tables. for each of the following 8-way joins, state how many join orders are possible and why (make sure to explain the reason). note ri ⋈ rj and rj ⋈ ri (switching around the order of two joined relations) are different join orders. in the join expressions below, ⋈ denotes an inner join, |⋈ denotes a left outer join, ⋈| denotes a right outer join, and |⋈| denotes a full outer join. hint: note commutativity of the different types of join operations.

a) r1 ⋈ r2 ⋈ r3 ⋈ r4 ⋈ r5 ⋈ r6 ⋈ r7 ⋈ r8

b) r1 ⋈ r2 ⋈ r3 |⋈ r4⋈ r5 ⋈ r6 ⋈ r7 ⋈ r8

c) r1 ⋈ r2 ⋈ r3 ⋈| r4⋈ r5 ⋈ r6 ⋈ r7 ⋈ r8

d) r1 ⋈ r2 ⋈ r3 |⋈| r4⋈ r5 ⋈ r6 ⋈ r7 ⋈ r8

Solve the following javafx application: write a javafx application that analyzes a word. the user would type the word in a text field, and the application provides three buttons for the following: - one button, when clicked, displays the length of the word.- another button, when clicked, displays the number of vowels in the word.- another button, when clicked, displays the number of uppercase letters in the word(use the gridpane or hbox and vbox to organize the gui controls).

Write a program that uses a random number generator to generate a two digit positive integer and allows the user to perform one or more of the following operations: a. double the number. b. reverse the digits of the number. c. raise the number to the power of 2, 3, or 4. d. sum the digits of the number. e. if the number is a two-digit number, then raise the first digit to the power of the second digit. f. if the number is a three-digit number and the last digit is less than or equal to 4, then raise the first two digits to the power of the last digit. after performing an operation if the number is less than 10, add 10 to the number. also, after each operation determine if the number is prime. each successive operation should be performed on the number generated by the last operation. your program should not contain any global variables and each of these operations must be implemented by a separate function. also, your program should be menu driven. 7. (fraction calculator) write a program that

Which statement is true of web-based social media? a. they allow consumers to interact with and update content. b. they cannot be updated easily, as compared to print media. c. they are expensive to produce and maintain, as compared to print and television. d. they can exist independent of the internet.