Choose the correct Set-builder form for the following set written in Roster form:

{−2,−1,0,1,2}

a. {x | x is an integer and -4 < x < 4}

b. {x | x is an integer and x > -3}

c. {x | x is an integer and x < 3}

d. {x | x is an integer and -3 < x < 3}

At the beginning of the year, adrian's savings account balance was \$28$28. each week, he deposits another \$15$15 into that account, and he doesn't spend any of his savings. is his savings account balance proportional to the number of weeks since the start of the year?