. Define implicitly the stream of factorials: 0!, 1!, 2!, . . .. Remember that an implicit definition of a stream is a define where the resulting stream is the thing being defined, but also shows up in the form that the thing is being defined to. See the lecture slides. 2. Define implicitly the stream of the negative powers of 2, i. e. 1 2 , 1 4 , 1 8 , 1 16 , . . .. 3. (a) Define sin-stream, the stream corresponding to the sequence: (−1) k x 2k+1 (2k + 1)! for x = 0, 1, 2, . . . This is a stream of values dependent on x, so you should wri