Consider an ordinary deck of 52 playing cards with four suits (hearts, spades, diamonds, clubs) and 13 ranks in each sui

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Consider an ordinary deck of 52 playing cards with four suits(hearts, spades, diamonds, clubs) and 13 ranks in each suit (A, 2,3, 4, 5, 6, 7, 8, 9, 10, J, Q, K). You pick cards from the deck oneat a time without replacement. What is the minimum number of cardsyou must pick in order to guarantee that you get,
a) a pair of any rank
b) three of any rank
c) three aces