Write Java programs that perform the following tasks:

$1]$ Allows user to input a positive integer n from the keyboard:

Determines and prints the sum of the even integers in the range $1...$n: o

$2]$ Allows user to input a positive integer n from the keyboard, then determines the number of even and the number of odd integers in the range $1...$n$.$

$3]$ Allows user to input a string from keyboard; string will then be printed down the page $-$ one character per line.

$4$ Allows user to input a string from keyboard; program will then count the number of upper$-$case and lower$-$case characters in the string $($and print these results$).$

$5]$ Allows user to input a string from keyboard; string will then be printed diagonally down the page