Seed-sorting morning

The notice below contains five deliberate errors. Check spelling, subject–verb agreement, verb forms and apostrophes.

Volunteers is asked to arrive at the community hall by nine o’clock. The sorting session will take place tomorow morning. Each helper should wears clean gloves. The seeds will be placed in seperate trays according to type. Label’s must be fixed securely to every tray. The organiser will collect the completed trays at the end of the session.

Proofread this notice. Find the five errors and give each correct form. List only the five corrections.