1) Describe the meaning of the essential methods add(x), deleteMin(), and size() that are supported by the priority queue interface (5 marks). Implement those methods using a singly-linked listAnalyze the running time of the add(x) and deletMin() operations based on this implementation.2) Implement the stack methods push(x) and pop() using two queues. Analyze the running time of the push(x) and pop() operations based on this implementation.