Explain whether or not you think remote control utilities (such as Autotask/LogMeIn, TeamViewer, and GoToMyPC) are viable options to VPNs. Do these programs offer the same options and functionality as VPNs?What are some of the pros and cons?If you have personal experience with VPNs or remote control software, please share your thoughts with us. You may also need to research one or more of these products and compare your findings to what we've learned about VPNs this week.

Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?