Part1: 
Input Model
I1 = {Coke, Sprite, Juice, Water}
I2 = {Icy, Normal}
I3 = {Receipt, Not}
1-wise combinations: 8 = 4 + 2 + 2
2-wise combinations:20 = 4*2 + 4*2 + 2*2
3-wise combinations:16 = 4*2*2
Consider
T1: (Coke, Icy, Not)
T1 covers 3 2-wise combinations: Coke Icy | Coke Not | Icy Not
T2: (Sprite, Icy, Receipt)
T2 covers 3 2-wise combinations: Sprite Icy | Sprite Receipt | Icy Receipt
Coverage:
1-wise: 5 5/8   62.5%
2-wise: 6 6/20  30%
3-wise: 2 2/16  12.5%
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Part2
Input Model:
String name => {cap}, {nocap}
            => {space}, {nospace}
            => {>10}, {2-10}, {1}, {0}
Student Type=> {Grad}, {UGrad}
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N-wise:
1-wise: 8
{cap}, {nocap}, {space}, {nospace}, {>10}, {2-10}, {1}, {0}
2-wise （satisfiable）: 
{cap, space}, {cap, nospace}, {nocap, space}, {nocap, nospace}, {cap, >10}, {cap, 2-10}, {cap, 1}, {nocap, >10}, {nocap, 2-10}, {nocap, 1}, {nocap, 0}, {space, >10}, {space, 2-10}, {space, 1}, {nospace, >10}, {nospace, 2-10}, {nospace, 1}, {nospace, 0}
18 satisfiable 2-wise combination equivalence classes.