PLEASE SHOW HOW IT'S DONE ON EXCEL. PLEASE DON'T USE AI TO ANWER. I WILL RATE.

$($Pricing a call and put$)$ A stock traded for $$25$ today will, in $1$ year, be worth either $$35$ or $$20.$ If the interest rate is $3\%$:

a$.$ What is the value today of a $1-$year European call option on the stock with exercise price $$30?$

b$.$ Calculate the value today of a $1-$year European put option on the stock with exercise price $$30.$

c$.$ Show that put$$call parity holds: That is parts a and b$,$ show the following:

Call price$+$X$/(1+$r$))=$ Stock price today$+$ Put price