please solve all problems

1. Why are LD50 values considered an estimate of lethality for humans? 2. Tomcat meal bait with bromethalin is a product used to kill rodents, such as rats and mice. Have a look at the SDS for this product, and answer the following questions: a. How much of the Tomcat meal balt (in grams) would a mouse need to eat for it to be a lethal dose (hint: assume the mouse weighs 20 grams = 0.02 kilograms) 0..1 grams b. How much (in grams) of the product would kill a pet dog if accidentally eaten at meal-time (assume the dog welghs 20 pounds = 9.07 kg) 3. These "death cap" mushrooms are hazardous because they contain toxins (amanita toxins or amatoxins). Ingestion of a handful of mushrooms contains about 20 mg of toxin and is sufficient to kill an average size human (170 lbs) in 12-24 hours. a. Estimate the LD50 value from the above data (show work) b. Is this an example of acute or chronic toxicity? 6. Are amatoxins considered extremely toxic, highly toxic, moderately toxic, slightly toxic or harmless (based on the Hodge and Sterner Scale, Table 1 In link here)