Obtain the correct validity of P(n)=12+22+32+.n2=n(n+1)(2n+1)/6 when trying to prove P(k) a. Assume P(1) is true. b. Cannot be done c. Operating with terms in P(k) d. We assume this step. Moving to another question will save this response. Find an alternative to a recursive algorithm. a. There is not an alternative b. All are incovenients with recursive algorithms. c. A repetitive algorithm (loop) d. A no repetitive algorithm (no loop)