The Blood pressure function .

(a)

Let the time at blood pressure is .

.

Substitute and .

.

function is  for  values in the interval , those are .

Solving them simultaneously.

.

The time at blood pressure is .

(b).

Let the time at blood pressure is  .

.

Substitute and .

.

 function is  for  one value in the interval that is .

  .

  .

he time at blood pressure is .

(c)

Let the time at blood pressure is .

Substitute and .

Solve it by using substitution process.

Substiute .

.

Substiute .

.

Substiute .

.

Substiute .

.

It is exceeding .

So subustiute .

.

The value is too high.

So subustiute .

.

Therefore, the range of is above .

Subustiute .

.

Subustiute .

 .

Subustiute .

.

It is in out of range. 

Subustiute .

.

Subustiute .

.

Subustiute .

.

Subustiute . 

.

Subustiute . 

.

From  to  interval of time, temperature increasing is from  to .

So in between there exists interval .

Subustiute .

.

It is out of range.

Subustiute .

.

It is in out of range.

Hence the values are not to be considered.

Subustiute .

.

Subustiute .

.

Subustiute .

.

Subustiute .

.

Subustiute .

.

From the above calculations :

The time at blood pressure is .

(a).

The time at blood pressure is .

(b).

The time at blood pressure is .

(c).

The time at blood pressure is .