Please see the attached PDF for instructions. Also attached is the information from assignment 3 which you will need to answer this assingment. The file path is as follows: The first thing you will need is the data.txt file, the next is senator text file:HW3_Davis.zip\HW3_Davis\src\cs520\hw3\part2

2 MarksLearning Outcome(s):Recognize the main elements of portals development.Question OneWhat is the difference between synchronous and asynchronous web methods? Give an example of synchronous and asynchronous web methods? Is it possible to transform a synchronous web method to asynchronous web methods? If yes, state how?1.5MarksLearning Outcome(s):Evaluate the effectiveness of portals.Question TwoContent proxy is a web service on your server that can fetch data from external URLs and return it to the browser. How does the proxy improve the load time for users?1.5 Marks MarksLearning Outcome(s):Evaluate the effectiveness of portals.Question ThreeWhat are the advantages and disadvantages of using HTTP POST for web service calls?

CONFIDENCE INTERVALSOne of the most popular ways to estimate an unknown parameter is the confidence interval. Instead of just using a point estimate, it gives an interval estimate. This gives more information about the unknown parameter. In this assignment, we will examine confidence interval. Download the dataset JNJ.csv from the course ,datawebsite.Using R, compute the sample mean of closing price of Johnson and Johnson's (JNJ) daily stock prices.Using R, compute the standard deviation. Also, compute the 90%, 95%, and 99% confidence intervals for the true mean closing JNJ stock price. Based on 3, discuss the pattern you see from these three confidence intervals and explain why such a pattern exists.What is the advantage(s) and disadvantage(s) of increasing the confidence levels? Explain.Interpret the confidence intervals you've calculated from part 3.Using a Word document, show the relevant calculations as well as the answers/solution. Copy the screenshots of the R output and paste them into the Word document. Your screenshot must include the current date using the function Sys.Date(