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Provide the Lewis dot structures for the following three molecules and ions. Show all your work to generate the structures. a)  BI3 b) XeO3 c) NO2- Scan and submit your work for credit.

This figure is not a BST.  Give one reason why it is not a BST (there might be more than one reason, only give us one.)

Write a recursive function which takes an array as input, and prints the values of the inputs in pairs. The last line of output should contain both the first and last values from the array; the second-to-last line should contain the second and second-to-last, etc. (If the number of elements in the array is odd, then do not print the one in the middle.) Example:     INPUT: [ 1,2,3,4,5 ]     OUTPUT:        2 4        1 5

Why is it not possible to traverse a singly-linked list backwards?

Give the first six terms of the following sequences. You can assume that the sequences start with an index of 1 a) A geometric sequence in which the first value is 5 and the common ratio is 8. [3 points] b) An arithmetic sequence in which the first value is 34 and the common difference is 5. [3 points] c)  Evaluate the summation [4 points]

How many ways are there to permute the letters in the following words: a) “Tennessee”? [5 points] b)  “SOUPSPOON”? [5 points]

For the Developmental Profile Part 1 and Part 2 assignments in this course, you chose a young child below the age of thirty-six months and conducted multiple visits to get to know the child and family.  Include BOTH of these things in your answer: Tell me some things you now know about the child and family as a result of this assignment (that you did not know before) What activity did you conduct with the child? Why did you choose that activity for this child?

When selecting a column from a DataFrame using bracket notation, what is a common mistake highlighted in the documents?

Part 1) Please draw an integrating sales and purchase UML model on a paper. Part 2) Since sales and purchasing systems are implemented using a computerized accounting information system, discuss at least two frameworks that could be applied to an evaluation of the system. Describe for each framework a few details about how the framework would be applied to your UML diagram. For Part 2, write your answer in the textbox.  For Part 1, draw the model on the scratch piece of paper and show it to the camera. Then, you have 10 minutes from when you close out the testing window to email a picture of the model to the professor at hpt5087@psu.edu (or through Canvas email). Once you do, the additional details visible on the email picture can improve your grade over what the camera picks up. If the files deviate significantly, then the details visible through the camera view will be what is graded for the exam. 

When using train_test_split() and training a linear model with model.fit(), which data should be passed to model.fit()?