Alex is ordering his girlfriend a bouquet of flowers for their anniversary. roses cost $5 each and carnations cost $2 each. he would like to include at least 3 flowers in the bouquet. to stay in his budget, he just not spend more than $36. which combinations are possible solutions? select all that apply.

a) 4 roses and 2 carnations
b) 6 roses and 5 carnations
c) 5 roses and 3 carnations
d) 1 rose and 1 carnation