Write the algorithm which finds the second maximum value of the array. Then find the complexity of the algorithm as Big O notation

Prime numbers can also be generated by an algorithm known as the Sieve of Eratosthenes . The algorithm for this procedure is presented here. Write a program that implements this algorithm so as to find all prime numbers up to n = 150. Sieve of Eratosthenes Algorithm To Display All Prime Numbers Between 1 and n Step 1: Define an array of integers P . Set all elements P i to 0, 2 <= i <= n. Step 2: Set i to 2. Step 3: If i > n , the algorithm terminates. Step 4: If P i is 0 (value i is a prime number), then i is prime and display its value. Step 5: For all positive integer values of j , such that i * j ≤ n , set P i ∗ j to 1 (non - prime). Step 6: Add 1 to i and go to step 3

Compute the distance between the positions of the first and last zero element in the given array. For example, if the array is 3 0 1 0 4 9 5 0 6 your algorithm should yield 7 - 1 = 6. If the array contains a single zero, return 0. If it doesn't contain any zeroes, return a negative value.

I need the code from start to end with no errors and the explanation for the code ObjectivesJava refresher (including file I/O)Use recursionDescriptionFor this project, you get to write a maze solver. A maze is a two dimensional array of chars. Walls are represented as '#'s and ' ' are empty squares. The maze entrance is always in the first row, second column (and will always be an empty square). There will be zero or more exits along the outside perimeter. To be considered an exit, it must be reachable from the entrance. The entrance is not an exit.Here are some example mazes:mazeA7 9# # ###### # #   ## # # #### #     ## ##### ##       ########## RequirementsWrite a MazeSolver class in Java. This program needs to prompt the user for a maze filename and then explore the maze. Display how many exits were found and the positions (not indices) of the valid exits. Your program can display the valid exits found in any order. See the examples below for exact output requirements. Also, record…