can you please give some formulas and steps to solve? discipline "computer applications in business"

Approximating arc length of a curve $y=f(x).$ Construct a model in Excel to approximately calculate the length of the arc of a curve $y=f(x).$ Then:

a$.$ Use your model to calculate the arc length of $y=sin(x)$ on the interval $x=0$ to $.$

b$.$ Use your model to calculate the perimeter of a circle with radius $r=1.($Hint: The perimeter of a circle can be viewed as the sum of the arc lengths of four quarter circles. The arc lengths of each quarter circle are identical. We can then take, for example, a quarter circle $y\frac{?}{S}=QRT(1^2-x^2)$ on the interval $x=0$ to $1.)$

Hint $1$: You can save time by starting with our model in Homework $1,$ Question $6$ and make changes.

Hint $2$: that this method will always underestimate the true length since the straight line $c$ is always shorter than the arc $l.$

Required output: The functioning Excel model and two numbers $($answers to questions a$.$ and b$.).$