Sequence and Cauchy sequence

. I need to get this done in 3 hours.. i am attaching the notes as well.. is there anyone who can help? I will pay 15 dollar. i am attaching the notes and the question as well. I GIVE HIGH RATE. If you can do few of them, please ask me ..im online and we can negotiate 1)Find a sequence of real numbers {a_i} such that lim┬(n→∞) a_n does not exist , but it has 3 subsequential limits of 0,1,2. 2) Assume {p_n}, and {r_n} are Cauchy sequences in ℝ . Using the definition of a Cauchy sequence prove that {p_n+r_n} is a Cauchy sequence in ℝ. 3) Prove that {1/n^2 } is a Cauchy sequence in ℝ. 4) Assume {p_n}, and {r_n} are Cauchy sequences in ℝ . Using the definition of a Cauchy sequence prove that {p_n+r_n} is a Cauchy sequence in ℝ. 5). Suppose that {a_i} is a Cauchy sequence in a metric space X,d and lim┬(n→∞) a_n=p. Suppose, in addition, {b_i} is a sequence such that d(a_n,b_n)<1/n for all integers n. Prove that lim┬(n→∞) b_n=p. 6) 3. Let {a_i} be a sequence in ℝ. Prove lim┬(n→∞) a_n=0, if and only if, lim┬(n→∞) |a_n |=0. If lim┬(n→∞) |a_n |=1, is it true that lim┬(n→∞) a_n=1? Prove your answer 7) Let {a_i} be a sequence in a metric space X,d. Prove that lim┬(n→∞) a_n=p if and only if lim┬(n→∞) d(a_n,p)=0. 8) Suppose that {a_i} is a sequence in ℝ such that lim┬(n→∞) a_n=0. Suppose that {b_i} is a sequence in ℝ such that |b_i |≤M, for all i where M is some positive real number. Prove from the definition of a limit of a sequence that lim┬(n→∞) 〖(a〗_n b_n)=0.