solution

App/Program.cs

@@ -1,4 +1,6 @@
 using System;
+using System.Globalization;
+using System.Text.RegularExpressions;
 
 namespace App
 {
@@ -11,12 +13,29 @@ static void Main(string[] args)
 
         public static string ConvertToTitleCase(string inpStr)
         {
-            return inpStr;
+            if (inpStr == null)
+                throw new Exception("input cannot be null");
+            //creates a TextInfo based on the "en-US" culture.
+            TextInfo myTI = new CultureInfo("en-US", false).TextInfo;
+            //replace all alphanumeric with spaces
+            string outStr = Regex.Replace(inpStr, @"[^a-zA-Z0-9]+", " ");
+            //convert to titlecase and remove excess spaces at the end
+            return myTI.ToTitleCase(outStr.ToLower().Trim());
         }
 
         public static string ConvertUnixToDateString(long? inpUnixSeconds)
         {
-            return inpUnixSeconds.ToString();
+            try
+            {
+                //convert to DateTimeOffset
+                DateTimeOffset dateTimeOffset = DateTimeOffset.FromUnixTimeSeconds((long)inpUnixSeconds);
+                //return formatted date
+                return dateTimeOffset.ToString("MMMM d, yyyy");
+            }
+            catch
+            {
+                throw new Exception("invalid input");
+            }
         }
     }
 }