2-6

m = [-1, 3, 64, 3, 2, -3, 42, -78, -19, 30, 23, 11, 21, -90, 1, -1, 7]

a = []
b = []
count = 1

while count < m.length  do
        if m[count] % 2 == 0
        puts m[count]
end
count += 1
end

m.find_all{ |elem| elem % 2 == 0 }