$[5]$ On earth, a pendulum makes exactly $20$ complete oscillations in $22\mathrm{.}3s.$

a$.$ What is its length?

$b-d$ : It is released from rest at an angle of $0\mathrm{.}174$ radians.: $(0)=0\mathrm{.}174$rad.

b$.$ What is the angle at $2\mathrm{.}0$ seconds? $(2)=?$

c$.$ What is its angular velocity at $2\mathrm{.}0s?\{\frac{d}{dt}(2)=\}$

d$.$ What is the first time it is at the equilibrium $($center$)$ position $($i$.$e$.,$ where $=0)?$

e$.$ What is the period if this pendulum were on the Moon where $g_{\text{M}\text{o}\text{o}\text{n}}=1\mathrm{.}63\frac{m}{s^2}?$