Which one is a valid variable declaration? a-        int my_num = 100.0; b-       int $my_num = '10000'; c-        int myNum = 1000; d-       int my num = 100000;

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QUESTION 1 Evaluate the following expressions, assume the following declarations: int x = 4; int y = 9/2; int num = 6; num *= x + y; What is the value of the num after expression is evaluated?

1 using System; 2 using System.Text; 3 class Program { staticvoid Main(string[] args) { int choice,games_choice; Console.WriteLine("You are on a quest for a rare flavor of chips you saw on an ad. The inside of the bag has an invaluable prize that could change your life forever. You decide to dedicate today to find that bag of chips. Do you go to Walmart or Costco first?"); Console.Write("Press 1 for 'Walmart' or Press 2 for 'Costco'\n"); choice = int.Parse(Console.ReadLine()); if(choice==1) { Console.WriteLine("You begin your meticulous search in the isles of the Walmart Supercenter only to find an empty display of the newly released rare flavor of chips. Out of the corner of your eye you see a nearby shopper with three bags of those rare chips in her basket casually strolling along. Craziness pops in your head and you have to make a quick decision. Your first option is to ask her nicely for one of the bags but that just seems far fetched. Your second option is to challenge her to a…