An unsorted list is passed to the script. Write a program that will output the sum of even numbers

./cond1.sh "1,2,3,4,5,6,7"

12

./cond1.sh "4,3,1"

4

./cond1.sh "2,2,9,3,8"

12

./cond1.sh ""

0

Develop a script that takes the temperature value in Celsius OR Kelvins and returns the inverse value. The formula is pretty simple: C = K - 273; K = C + 273

./temp.sh 55C

328K

./temp.sh 122K

-151C

./temp.sh 98C

371K

Develop script that takes any string and calculate count of letters, numbers, symbols *!@#$%^&()_+ inside except whitespaces

./check_string.sh 'Hello !! ** 564gfhf'

Numbers: 3 Symbols: 4 Letters: 9

./check_string.sh 'Hello !! +'

Numbers: 0 Symbols: 3 Letters: 5

./check_string.sh 'Hello !!+'

Numbers: 0 Symbols: 3 Letters: 5