Income tax calculation with HRA Exemption and Standard Deduction

Dear Sir,

Currently I am Working with Department of Education in Delhi (State Governement) Location from April 2018. I am paying rent accomodation of 10,000 per month.  Given below is my salary Structure per Month :

Basic = 44900

HRA = 10776

DA = 3143

TA = 3852

Deductions:

NPS (National pension) = 4804

Education Cess = 80

DHS/CGHS = 650

UTGIS/CGEIS = 20

So My Gross Income is 7,50,000 lakhs per Annum ( Rs 62,500/month) and Saving under section 80C = 1,50,000 Lakhs ( 57500 of nps + 92500 of ppf). I want to know about what will be the Taxable income in my case and also plz solve below four questions:

Q1) My HRA exemption under section 10(3) using rent slips is least of three condition is around Rs 60,000 per annum, i am confused with HRA exemption, is it comes under 1.5 lakhs saving or apart of that ?

Q2) TA is Rs 3852 so full amount is taxable or only 1600/month as exempt from tax. Plz answer ?

Q3) According to me, Taxable salary =

                        Gross income - Saving(1.5 lakhs) - HRA Exemption - Standard deduction

                        =  7,50,000 - 1,50,000 - 60,000 - 40,000

                        = 5,00,000 ( is it correct or not ?)

Q4) Some peoples are saying that HRA Exemption and Standard deduction is part of Saving 1.5    Lakhs. If it is, then Taxable income will be :                            

       = Gross Income - Saving (1.5 Lakhs)

      = 7,50,000 - 1,50,000

      = 6,00,000 ( is it correct or not )

Regards

Kuldeep Singh