Please help me with the problems from a to j , and a and b in 2), thank you. Please answer based on Java language.

a) In Java, each class must be in a separate file; T/F?! b) A Java program must contain at least two classes: T/F? c) javac is: ....(explain briefly in 1 - 2 lines) ......... d) In general, there are five phases to create and execute a Java application, and these phases are e) A public class Employee must be placed in a file that has a filename............... 1) Write Java code fragment that prints the numbers from 1 to 100 in reverse order (separated by commas), like this: 100, 99, 98, .. g) The driver class typically contains one static method called ... h) (fill in blank, ref Chap.01) Popular desktop operating systems include Popular mobile operating systems used in smartphones and tablets include (from chap. 1) 1) Given x = a + (b-3)/2 + c = 10; What is the value of x if you know that a-12, b-15, c2? j) Given this code (loop): X = 0; do{ y = W + X; X += 5; } while (x