Suppose that you are going to employ the bull spread strategy using put options. How is this strategy performed? Note that K1 and K2 represent the strike prices.

Long put with K1 and Long put with K2 where K1 < K2.

Long put with K1 and Short put with K2 where K1 < K2

Short put with K1 and Long put with K2 where K1 < K2

Short put with K1 and Short put with K2 where K1 < K2