I'll give you a hand with #4.
Sort answer YES.
Long answer: Yeah,
Repentance: Repentance is the activity of reviewing one's actions and feeling contrition or regret for past wrongs.
2 Chronicles 7:14 ESV If my people who are called by my name humble themselves, and pray and seek my face and turn from their wicked ways, then I will hear from heaven and will forgive their sin and heal their land.
1 John 1:9 ESV If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.
Acts 3:19 ESV Repent therefore, and turn again, that your sins may be blotted out.
Luke 13:3 ESV No, I tell you; but unless you repent, you will all likewise perish.
Acts 17:30 ESV The times of ignorance God overlooked, but now he commands all people everywhere to repent.
2 Peter 3:9 ESV The Lord is not slow to fulfill his promise as some count slowness, but is patient toward you, not wishing that any should perish, but that all should reach repentance.
Ezekiel 18:21-23 ESV But if a wicked person turns away from all his sins that he has committed and keeps all my statutes and does what is just and right, he shall surely live; he shall not die. None of the transgressions that he has committed shall be remembered against him; for the righteousness that he has done he shall live. Have I any pleasure in the death of the wicked, declares the Lord God, and not rather that he should turn from his way and live?
Revelation 2:5 ESV Remember therefore from where you have fallen; repent, and do the works you did at first. If not, I will come to you and remove your lampstand from its place, unless you repent.
James 4:8-10 ESV Draw near to God, and he will draw near to you. Cleanse your hands, you sinners, and purify your hearts, you double-minded. Be wretched and mourn and weep. Let your laughter be turned to mourning and your joy to gloom. Humble yourselves before the Lord, and he will exalt you.
Proverbs 28:13 ESV Whoever conceals his transgressions will not prosper, but he who confesses and forsakes them will obtain mercy.
Acts 2:38 ESV And Peter said to them, “Repent and be baptized every one of you in the name of Jesus Christ for the forgiveness of your sins, and you will receive the gift of the Holy Spirit.
Revelation 3:19 ESV Those whom I love, I reprove and discipline, so be zealous and repent.
Mark 1:15 ESV And saying, “The time is fulfilled, and the kingdom of God is at hand; repent and belie
Take care,
Ismael
For all questions involving praying: Matthew 7:7, Matthew 17:20, Matthew 21:21, Mark 11:24, John 14:12-14, Matthew 18:19 and James 5:15-16.
http://www.jehovahs-witness.net/members/adult/266540/1/Serial-Killer-is-not-afraid-of-Judgement-from-the-LORD#.U2fUtvu9LTo