If a1=5 and an=an-1-4 then find the value of a5

Can someone check my answer? you

If g(x) is an odd function, which function must be an even function?

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)