find the solutions of attached questions

1. A consumer utility function is given below U= X1X2 and her budget constraint B is a combination X1+x21+r, where r is the interest rate and r-20. Now find the optimum value using necessary conditions for constrained optimization and also show the sufficient conditions using Bordered Hessian. Give your justification why it is an optimum point. 2. [(x+3) (x+1) mad.x find the integral using integration by parts rule