Please help me with this question. Please explain step by step. 2. Diazinon, also known as spectracide, is a widely used insecticide on fruit trees. The decomposition of diazinon follows first-order kinetics. It has a half-life of 2.0 weeks.

a. How long would it take for a 55.0-gram sample of diazinon to decompose into 15.5 grams? Use appropriate units.

b. How much of a 55.0-gram sample of diazinon would be remaining after 35.0 days?

C. What is the rate constant, k, for this reaction? Use appropriate units.