Please I need help. in Java

1. Method name: lowestAlphabetically Parameter(s): A String of lower-case words separated by spaces and made up of the letters a-z. The String will have at least one word. Return value: A String containing the lowest alphabetical word. The String method compareTo() does a lexicographic comparison between two strings, which allows you to test for the lowest alphabetical word. Read documentation on compareTo() in order to understand how to use it. Example: lowestAlphabetically("cat dog apple fish") would return "apple".
2. Method name: smallestNumberInTwoStrings Parameter(s): Two String parameters. Each string is made up of numbers separated by spaces. The first string must have at least one number. Return value: An int containing the smallest number found in the two strings. Example: findSmallestNumberInTwoStrings("12 3 5", "2 -1 10") would return -1.