c) Suppose a BinaryTreeNode reference R refers to the root node of a binary tree, describe the key algorithm to compute the total number of leaf nodes in the tree. Here, Rllink is a reference that points to R's left child and R.rlink points is a reference that points to A's right child.

RPC (remote procedure call) is used to a. establish a server on remote machine that can respond to queries b. retrieve information by calling a query c. both a and b d. none of the above

write the code for the following triggers in MySQL following the style shown in the text. A: When adding a customer, add the customer balance multiplied by the sales rep's commission rate to the commission for the corresponding sales rep. B: When updating a customer, add the difference between the new balance and the old balance multiplied by the sales rep's commission rate to the commission for the corresponding sales rep. C: When deleting a customer, subtract the balance multiplied by the sales rep's commission rate from the commission for the corresponding sales rep.   CREATE TABLE REP(REP_NUM CHAR(2) PRIMARY KEY,LAST_NAME CHAR(15),FIRST_NAME CHAR(15),STREET CHAR(15),CITY CHAR(15),STATE CHAR(2),POSTAL_CODE CHAR(5),COMMISSION DECIMAL(7,2),RATE DECIMAL(3,2) );CREATE TABLE CUSTOMER(CUSTOMER_NUM CHAR(3) PRIMARY KEY,CUSTOMER_NAME CHAR(35) NOT NULL,STREET CHAR(20),CITY CHAR(15),STATE CHAR(2),POSTAL_CODE CHAR(5),BALANCE DECIMAL(8,2),CREDIT_LIMIT DECIMAL(8,2),REP_NUM CHAR(2) );INSERT INTO…

Which one of the following SQL statements produces the same result asselect time_of_day_hour, time_of_day_minute, time_of_day_secondfrom time_of_daywhere time_of_day_hour BETWEEN 2 and 8;   Question 1 options:   1)  select time_of_day_hour, time_of_day_minute, time_of_day_secondfrom time_of_daywhere time_of_day_hour >= 2 and time_of_day_hour <= 8;   2)  select time_of_day_hour, time_of_day_minute, time_of_day_secondfrom time_of_daywhere time_of_day_hour > 2 and time_of_day_hour < 8;   3)  select time_of_day_hour, time_of_day_minute, time_of_day_secondfrom time_of_daywhere (2 <= time_of_day_hour <= 8);   4)  select time_of_day_hour, time_of_day_minute, time_of_day_secondfrom time_of_daywhere time_of_day_hour > 2 and <8;