Help please

I just took a screen shot of the whole question so that's all there is

i do not know the answer

step-by-step explanation:

the answer should be a. snail

so mark-up is 0.4 multiplied by 180 = 72

answers

\3. yes the presentation (i.e. odd numbers being written as differences of two squares) is possible for all odd natural number however the presentation may not be unique. for example,  57=112−82=292−28257=112−82=292−282.

\4. 2 can't be written as a difference of two squares because 4-1=3 and 1-1=0 and the difference of squares grows to integers larger that 3.

can i get some in proving questions 1 and 2?