can some do this for me ASAP.?

1. write a code which deletes the previous of the last element in a linked list

2. write a code which for a given sentence by the keybord(in a stack S) will replace all lowervae letters with uppercase. Print the sentence before and after changess. Use the elementar function Push, POP ant TOP.
use islower(c) for lowercase and toupper(c) for converting a character into uppercase

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