1. why is it important to evaluate the website on which you plan to shop? (1 point) it may not have a fast enough internet connection for your order to go through. it may not be trustworthy, and you risk identity theft. it may be out of stock of the item that you want to buy. it may not take the credit card you want to use. 2. how can you prevent online shopping risks? (1 point) share your password. save you information to the page on which you shop the most. use a secure browser. don’t worry about reading the privacy policy 3. which of the following online shopping website features to ensure that you are safe in using the website? (1 poin it is the most popular website. it has free shipping. it takes credit cards. it has a secure payment page.            50 points!

The idea that, for each pair of devices v and w, there’s a strict dichotomy between being “in range” or “out of range” is a simplified abstraction. more accurately, there’s a power decay function f (·) that specifies, for a pair of devices at distance δ, the signal strength f(δ) that they’ll be able to achieve on their wireless connection. (we’ll assume that f (δ) decreases with increasing δ.) we might want to build this into our notion of back-up sets as follows: among the k devices in the back-up set of v, there should be at least one that can be reached with very high signal strength, at least one other that can be reached with moderately high signal strength, and so forth. more concretely, we have values p1 ≥ p2 ≥ . . ≥ pk, so that if the back-up set for v consists of devices at distances d1≤d2≤≤dk,thenweshouldhavef(dj)≥pj foreachj. give an algorithm that determines whether it is possible to choose a back-up set for each device subject to this more detailed condition, still requiring that no device should appear in the back-up set of more than b other devices. again, the algorithm should output the back-up sets themselves, provided they can be found.\