 
<translate> Tambaya: Passage: An fara wasan farko na gasar cin kofin Spring Baking Championship a ranar 25 ga Afrilu, 2015. Lokaci na biyu na jerin ya fara ne a ranar 10 ga Afrilu, 2016, kuma ya ƙare a ranar 15 ga Mayu, 2016. Lokaci na uku ya fara ne a ranar 12 ga Maris, 2017, tare da Jesse Palmer ya maye gurbin Deen a matsayin mai masaukin baki. Lokaci na huɗu ya fara a ranar 12 ga Maris, 2018, tare da Ali Khan ya maye gurbin Palmer a matsayin mai masaukin baki.  Tambaya: Bisa ga wannan nassi, wanene mai karɓar bakuncin gasar burodi na bazara na kakar wasa ta 4? Bari mu ba da rafi na sani a kasa <eng> Q: Passage: The first season of Spring Baking Championship premiered on April 25, 2015. The second season of the series premiered on April 10, 2016, and concluded on May 15, 2016. The third season premiered on March 12, 2017, with Jesse Palmer replacing Deen as host. The fourth season premiered on March 12, 2018, with Ali Khan replacing Palmer as host.

Question: Based on this passage, who is the host of season 4 spring baking championship?
Let's give stream of consciousness below
 