One call-center is analyzing their Jan service data, which is saved to table T. Table T has four columns:

Type: enquiry type, categorical.

urgency:problem urgency level,higher value means higher urgency level. Integer type

length: call length in mins,numerical type

solved:if the enquiry is loved, logical:true or false

See example data below.

type

urgency

length

solved

A

1

5

Y

B

1

2

Y

B

2

20

N

C

3

1

Y

...

...

...

...

1(1).Code to find the maximum urgency value in the data.

2(4). Code to calculate the total call length for the highest urgency cases in Jan. Require to solve using loop.For example, if the highest "urgency" level in Jan is 4, then calculate the sum of "length" for which urgency is 4.

3(3). Same question as part 2, code to calculate the total call length for the highest urgency cases in Jan. Require to solve WITHOUT using loop.