25 seeds of delphinium and 200 seeds of lupin are planted. The germination of any seed is independent of the others. The probability that a delphinium seed germinates is 0.36 and a lupin seed germinates is 0.8.

i) Find the probability that exactly 5 delphinium seeds germinates

ii) Using suitable approximation, find the probability that at least 170 lupin seeds germinate