a landscaper must choose how to spend their time working on different projects, with the goal of maximizing revenue. small lawns take 1.5 hours to mow and trim, while large lawns take 2.5 hours to mow and trim. small lawns pay $65 per lawn, while large lawns pay $100 per lawn. landscaping jobs take 12 hours but pay very well at $600 per job. the landscaper does not prefer small lawns. because of this preference, the landscaper wants to ensure that they have a maximum of 4 small lawns to mow this week. also, taking into account the work week and travel times, the landscaper has a maximum of 50 hours to work jobs this week. finally, each landscaper at the company is required to mow and trim at least 6 large lawns over the course of the week. what type of problem is this question?