(Practice) For the following declaration statements, write a cin statement that causes the...

(Practice) For the following declaration statements, write a cin statement that causes the computer to pause while the user enters the appropriate data:

a.

int first num;

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b.

double grade;

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c.

double secnum;

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d.

char keyval;

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e.

int month, years;    double average;

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f.

char ch;    int num1, num2;    double grade1, grade2;

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g.

double interest, principal, capital;     double price, yield;

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h.

char ch, letter1, letter2;    int num1, num2, num3; 

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i.  

double temp1, temp2, temp3;    double volts1, volts2;