It takes lacey 3 hours to knit a stocking cap and 5 hours to knit a pair of mittens. she has at most 20 hours of spare time in a week and knits at least one pair of mittens each week. let x stand for the number of stocking caps and let y stand for the number of pairs of mittens. write a system of linear inequalities that models the number of stocking caps and pairs of mittens that lacey can knit in a week. graph the solution. a. 5x+3y≤1x≤1 b. 3x+5y≤20y≥1 c. 3x+5y≥20y≥1 d. 3x+5y≤20x≥1