Which of the following figures is the top view of the given figure?

What is the order of rotational symmetry of the given figure?

The grades obtained by 30 students of class VII are as follows:

$A^{+}\mathit{,}\mathit{ }{B}^{+}\mathit{,}\mathit{ }A\mathit{,}\mathit{ }B\mathit{,}\mathit{ }{A}^{+}\mathit{,}\mathit{ }{B}^{+}\mathit{,}\mathit{ }{A}^{+}\mathit{,}\mathit{ }B\mathit{,}\mathit{ }B\mathit{,}\mathit{ }{B}^{+}\mathit{,}\mathit{ }A\mathit{,}\mathit{ }A\mathit{,}\mathit{ }{A}^{+}\mathit{,}\mathit{ }B\mathit{,}\mathit{ }{B}^{+}\mathit{,}\mathit{ }A\mathit{,}\mathit{ }{A}^{+}\mathit{,}\mathit{ }B\mathit{,}\mathit{ }B\mathit{,}\mathit{ }A\mathit{,}\mathit{ }A\mathit{,}\mathit{ }{A}^{+}\mathit{,}\mathit{ }{A}^{+}\mathit{,}\mathit{ }B\mathit{,}\mathit{ }{B}^{+}\mathit{,}\mathit{ }B\mathit{,}\mathit{ }{B}^{+}\mathit{,}\mathit{ }{A}^{+}\mathit{,}\mathit{ }{A}^{+}\mathit{,}\mathit{ }A$ If a student has been selected at random, then find the probability that he has obtained grade $A^{+}$