Choose the correct options to complete the instructions on how to write a problem & solution essay.

Choose the correct option.

We write problem-solution essays in [informal|formal] style.

We [avoid using|try to use more] shortenings and colloquial expressions.

We usually write about [a single big problem|three different problems].

We normally suggest [2 solutions|1-3 solutions|5 solutions] in the essay.

We [need|don't need] to support the solutions with their possible results.

In the last paragraph, we give [our last suggestion|a summary of our ideas].