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I need help please

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?