The sets can either be presented in set builder form or roaster form. The
given sets presented in the required form are;
a. The set B is the set of days in the week that starts with letter S
Therefore;
The elements of B are; Saturday, Sunday
In roster method, we have; B = {Saturday, Sunday}
In set builder notation, we have; B = {x | x is a days in the week that starts with letter S}
b. C is the set of letters in PHILIPPINES
In roster form, we have; C = {P, H, I, L, I, P, P, I, N, E, S}
In set builder notation, we have; C = {Letters in the word PHILLIPINES}
Learn more here:
https://brainly.com/question/13642904