MATLAB 1) Use MATLAB to find the first integer n for which 12 + 32 +52 +...+(2n + 1)2 is a 6-digit number. 2) Use MATLAB to determine how many years it will take to accumulate at least $1,000,000 in an investment account if you deposit $5,000 initially and $10,000 at the end of each year, if the account pays 6 percent annual interest compounded monthly. 3) Write a MATLAB function "abcd(a,b,c,d) that finds the maximum of four numbers a, b, c, and d. Do not use MATLAB built-in functions