Number of prime numbers less than $1$lakh, whose digital sum is $2$

Express the following number as the sum of two odd primes.

$36$

Check whether the given number is prime or not.
$103$

Following pair of numbers are co-prime?

$13$ and $16$

Check whether the given number is prime or not.

$87$

Express the following number as the sum of twin primes.

$36$