Answer asap please in java

(25 points) Implement the following methods: a. ( 10 points) A method named issorted with the following signature that gets a linked list of Strings and checks whether the list is alphabetically sorted. The method must return true if the list is sorted and return false otherwise. publlc static boolean issorted b. (15 points) A method with the following signature that gets a linked list of Strings an nodes of it. The method returns a clone of the shortened linked list as the output. d starting from the second node, deletes all alternate public static LinkedList deleteAlt (LinkedListestring list)