A soma das idades de Janaina e Marisa e igual a 55 anos. A idade de Janaina mais o dobro da idade de Marisa resulta em 85 anos. Qual é a idade de cada uma? me ajudem e escrevam a conta por favor

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2