3. given: A = {b,i,o,d,e,g,r,a,d,a,b,l,e}, which of following in INCORRECT?

a. it uses capital letter to name
b. it does not list the object once
c. it uses braces
d. it uses commas

4. the set of months containing 30 days.

a. I = {january,march,may}
b. J = {february,april,june}
c. K = {june,july,august}
d. L = {june,september,november}

5. the set of secondary collors

a. M = {red,green,yellow}
b. N = {brown,pink,blue}
c. O = {green,orange,violet}
d. P = {white,black,grey}
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