Question 1. Write a Java application that reads in a line of input as a string and prints each of the following. Only the upper case letters in the string Every second letter of the string The string, with all vowels (A, E, I, O, U) by an underscore The number of vowels (A, E, I, O, U) in the string The positions of all vowels (A, E, I, O, U) in the string

Question 2. Write a Java application with loops that compute each of the following. The sum of all even numbers between 2 and 100 (inclusive) The sum of all squares between 1 and 100 (inclusive)

All powers of 2 from 2 to the 0th power up to 2 to the 20th power The sum of all odd numbers between a and b (inclusive), where a and b are inputs. The sum of all odd digits of an input. (For example, if the input is 32677, the sum would be 3 + 7 + 7 = 17).

Question 3. Write a Java application that converts a positive integer into the Roman number system. The Roman number system has the following digits: I 1 V 5 X 10 L 50 C 100 D 500 M 1,000 Numbers are formed according to the following rules: Only numbers up to 3,999 are represented As in the decimal system, the thousands, hundreds, tens, and ones are expressed separately The numbers 1 to 9 are represented as the following (as you can see, an I preceding a V or X is subtracted from the value and you can never have more than three Is in a row): I 1 II 2 III 3 IV 4 V 5 VI 6 VII 7 VIII 8 IX 9 Tends and hundreds are done the same way, except that the letters X, L, C and C, D, M are used instead of I, V, X respectively. Your application should take and input, such as 1978, and convert it to Roman numerals, MCMLXXVIII.

Question 4. A minivan has two sliding doors. Each door can be opened by either a dashboard switch, its inside handle, or its outside handle. However, the inside handles do not work if a child lock switch is activated. In order for the sliding doors to open, the gear shift must be in park and the mast unlock switch must be activated. Your task is to simulate a portion of the control software for the vehicle. The input is a sequence of values for the switches and the gear shift, in the following order: Dashboard switches for the left and right sliding door, child lock, and master unlock (0 for off or 1 for activated) Inside and outside handles on the left and right sliding doors (0 for closed 1 for open) The gear shift setting (one of P R N D 1 2 3) A typical input would be 0 0 0 1 0 1 0 0 P The input values should be hard coded in a separate class main method to test the different combinations of positions the switches can be in. Print left door opens and/or right door opens as appropriate. If neither door opens, print both doors stay closed.

This should be in java. Thanks!