Which vector in the figures best represents the acceleration of a pendulum mass at the intermediate point in its swing?

$A$ girl is swinging on a swing in the sitting position. What will be the effect on the time period of the swing if she stands up?

The length of a simple pendulum is increased by $1\%$. Its time period will

Two pendulums begin to swing simultaneously. If the ratio of the frequency of oscillations of the two is $7 : 8$,then the ratio of lengths of the two pendulums will be

$A$ simple pendulum is hanging from the ceiling of a lift. When the lift is at rest,the time period of the pendulum is $T$. If the resultant acceleration becomes $g/4$,then the new time period of the pendulum is: (in $, T$)

$A$ small sphere oscillates simple harmonically in a watch glass whose radius of curvature is $1.6 \ m$. The period of oscillation of the sphere is (acceleration due to gravity $g = 10 \ m/s^2$) (in $\pi \ s$)