Pls help me my teacher told us to crochet a spere but i dont know how to pls show me how by instruting me if you did answer i would be so happy pls dont report this question because i really need to know how for art

Achair of height 1 m is placed 1 m in front of a plane mirror. a girl is standing 3 m behind the chairas shown. find the minimum length of the plane mirror in order that she can see the whole imageof the chair.a. 0.50 mb. 0.75 mc. 0.80 md. 1.00 m