2) For a-d below, indicate whether the described relation (denoted using ~) involving a streaming platform's entities is an equivalence relation, or not. Explain your answers in 2-4 sentences each. Assume that i. Fans may be subscribed to any number of streamers on the platform, ii. A streamer can only belong to a single e-sports team but can be sponsored by any number of organizations, and iii. a streamer can play any number of video games on the platform. (a) fi-f2 for 2 fans if f and f are both subscribed to a particular streamer. (b) ti-t for 2 streamers if t and t2 are on a shared e-sports team. (c) S1~S2 for 2 streamers if si and s2 share the same sponsor. (d) V V2 for 2 video-games if v1 and v2 are played by the same streamer.