Give a regular expression for the language L1 of strings over alphabet Σ = {a, b, c} that have a pair of identical symbols separated by a substring whose length is a multiple of 3. For example, abcba, bb, cbabcb ∈ L1 but ε, a, bcbcab /∈ L1. Note that cbabcb is in the language two different ways. Briefly justify your answer.

You have written, as part of a school assignment, a research paper on the solar system. you want to share this paper on your school website. on which type of server will you upload it?

Write a function called checkfactor that takes two arrays of positive numbers, firstnumberrow and secondnumberrow. checkfactor checks if the first entry in firstnumberrow is divisible by the first entry in secondnumberrow, and performs the same operation on the next array elements until all entries have been checked. all the numbers are positive and the number of entries in the arrays are the same. the function should return the identified divisible numbers in two row arrays named firstdivisible and seconddivisible.restrictions: branches or loops should not be used. the code must use the internal mod and logical functions.hint: the mod function should be used to determine if two numbers are divisible. ex: for num1 and num2 if mod(num1,num2) is 0, then the two numbers are divisible.this is matlab

Which feature is selected to practice and save the timing of a presentation