You are hired to develop a database system for a real estate management company. The company$$s business is to rent apartments to tenants. The lease contains the following information:

Tenant$$s fist and last name

Tenant$$s e$-$mail address

Tenant$$s cell phone number

Tenant$$s preferred way of communication: either e$-$mail or sms

Full address of the apartment being rented

Size of the apartment in terms of number of bedrooms and number of bathrooms

Rent value in USD

Start and end days of the lease in the form of day$/$month$/$year

Each lease can have a maximum of two tenants$$ names on it