4. For each of the following questions, show your computer calculations in the space provided below each question and write the answer in the box. a. 15 != 15 Show your step-by-step calculation as it is done in the textbook: b. 47.63>=47.63 Show your step-by-step calculation as it is done in the textbook: c. '9' > 15 Show your step-by-step calculation as it is done in the textbook: 5. For int x=5,y=10,z=2; evaluate the following: a. (x!=5)&&(y=z Show your step-by-step calculation as it is done in the textbook: b. x>=z(x+y>=z) Show your step-by-step calculation as it is done in the textbook