A4-CS102A-2022Spring CS102A-22Spring Assignment 4 Contributor List: Design: Yitong WANG, Yida TAO JUnit: Yitong WANG, Dingyuan XUE Document: Yida TAO Solution & Test: Siyi WANG, Sicen LIU Question 1: BigBinary[Medium, 40 + 15 points] Question 2: Online Shopping[Medium, 60 + 5 points]