What did leonardo observe verrocchio create for his patrons?

What did Leonardo observe Verrocchio create for his patrons, The answer is Leonardo would have been exposed to both theoretical training and a vast range of technical skills including drafting, chemistry, metallurgy, metal working, plastic casting, leather working, mechanics and carpentry as well as the artistic skills of drawing, painting, sculpting and modelling.

Tenochtitlán was the capital of the aztec empire. it was a busy and bustling city where“there are daily more than 60,000 souls, buying and selling, and where are found all the kinds of merchandise produced in these countries.” when cortes arrived in 1519, theenormity of the trading market and the smoothness of it’s running both surprised and  impressed him.