Question: in the ml language write a function delnthc to delete...

In the ML language, write a function delnthc to delete the n-th character of a String WITHOUT using ML built in libraries and using non-tail recursion to write the functions. you may assume that the input string is always longer than n.

delnthc("abcdef", 4) -> "abcef"

All functions must be implemented twice, one if-then-else and one in pattern style.

Hope this is all the information needed, Thank you so much!