PHP Write a matchSSN function Write a function matchSSN($str) that takes a string representing a social security number as a parameter. The function should return true if the SSN is valid, and false if it is not. An SSN consists of 9 digits that are sometimes, but not always, separated by dashes between the 3rd and 4th digits and between the 5th and 6th digits (e.g. 123-45-6789). Use regular expressions in your solution (e.g. preg_match).

Problem DNA: Subsequence markingA common task in dealing with DNA sequences is searching for particular substrings within longer DNA sequences. Write a function mark_dna that takes as parameters a DNA sequence to search, and a shorter target sequence to find within the longer sequence. Have this function return a new altered sequence that is the original sequence with all non-overlapping occurrences of the target surrounded with the characters >> and <<. Hints: ●  String slicing is useful for looking at multiple characters at once. ●  Remember that you cannot modify the original string directly, you’ll need to build a copy. Start with an empty string and concatenate onto it as you loop. Constraints: ● Don't use the built-in replace string method. All other string methods are permitted. >>> mark_dna('atgcgctagcatg', 'gcg') 'at>>gcg<<ctagcatg' >>> mark_dna('atgcgctagcatg', 'gc')…

Caesars Cypher in C programming language How do you program an encryption and decryption for a Caesars Cypher that covers all the possible ASCII characters?  In this there should be a shift over K = 5 but the example below is K = 3.  This should result in actual character and not the control ASCII represenations. For example:  >>> $ encrypt(I have a key)N%mf{j%f%pj~>>> $ encrypt(see me at 3)xjj%rj%fy%8>>> $ decrpyt(|jfw%ns%gqzj)wear in blue Assume that the text parsing method has been succesful and it's the encryption/decryption of the char array that needs to be factored.    Formula Encryption -> C = E(k, P) = (P + k) (mod 26) Decryption -> P = D(k, C) = (C - k) (mod 26) Where k = 5

rografmiming CSC 101 Introduction VB Bau Section21436.02. Sntinn 2022 ta46581 OPRIV NEXTO Workbench Exercise 40443- deadne 04020022 1150 PM WORK AREA toThePowerOf is a function thet accepts two int parameters and returns the value of the first parameter raised to the power of the second. An int variable cubeside has aiready been deciared and initialized. Another int vaciable, cubevolume, has already been declared. Write a statement that calls toThePowerof to compute the value of cubeside raised to the power of 3, and store this value in cubevolume. SUBMIT 1 of 1: Sat Apr 02 2022 23:03:03 GMT-0400 (Eastern Dayilght Time) Type your selution here.