Use MATHEMATICAL INDUCTION to prove the following statements. 30 points You choose anyr 3 to prove 1. 12+22+32 +-..+ft2= nn+112n+11 2. 3+5+?+...+(2n+1):n(n+2) 3. 2+5+8+...+{3n1)=%n(3+n| 4. l+3+5+...+[2nl}=n 5- 2+4+6+...+2n=n[n+1)