I am confused on how to answer this question, I know its simple as I've done it before but I'm having a mental block.

A five-sided spinner's sides are labelled 1,2,3,4,5. The spinner is biased. The probability that the spinner will land on each number is given:

Probability: (1) - 0.36 (2) - 0.1 (3) - 0.25 (4) - 0.15 (5) - 0.14

a) Chris spins the spinner 50 times, work out an estimate for the number of times the spinner lands on 1.

b) Dylan spins the spinner twice. Work out the probability that:

i) it lands on 2 both times.

ii) the spinner will land on an even number exactly once.

Help would be appreciated