Consider that the following variables have been declared: int David_Tennant; double Matt_Smith; Which of the following statements are valid. Select all that apply.

a. Integer tenth = David_Tennant;
b. (double)David_Tennant = Matt_Smith;
c. Matt_Smith = double(David_Tennant;)
d. Matt_Smith = (double)David_Tennant;
e. Matt_Smith = David_Tennant;

Double eleventh = 11.50;
David_Tennant = eleventh. intValue();

Create a string list. 2. use console.readline() to collect values of firstname, lastname, street, city, state, zip, save them to list. 3. write a simple linq statement, call method uppercasewords() to change first letter to uppercase. 4. create a foreach statment to display the information. public static string uppercasewords(string value) { char[] array = value.tochararray(); if (array.length > = 1) { if (char.islower(array[0])) { array[0] = char.toupper(array[0]); } } for (int i = 1; i < array.length; i++) { if (array[i - 1] == ' ') { if (char.islower(array[i])) { array[i] = char.toupper(array[i]); } } } return new string(array);